There’s a certain comfort that comes with digging into a hearty, home-cooked meal, and my One-Pan Gluten-Free Stuffed Pepper Casserole is just that—a warm embrace on a plate. The last time I prepared this dish, the delightful scent of Italian spices wafted through my kitchen, making everyone wander in to see what was bubbling away in the oven. Imagine juicy tomatoes mingling with seasoned turkey sausage and protein-packed quinoa, all harmoniously baked together until golden and gooey.
Whether you’re navigating a busy week or craving a nourishing weekend feast, this casserole transforms a classic stuffed pepper into a stress-free, one-pot wonder. Plus, it’s incredibly versatile—feel free to swap in various veggies or tweak the spices to make it your own. Get ready to impress your family and friends with a comforting dish that packs flavors you’ll love, all while keeping it gluten-free and make-ahead friendly. Let’s start cooking!
Why is Stuffed Pepper Casserole a must-try?
Comforting, hearty dish: This one-pan wonder brings the warmth of home-cooked comfort food straight to your table.
Easy preparation: With minimal prep and clean-up, dinner never felt so effortless.
Nutritious twist: Packed with nutritious quinoa and vibrant veggies, it’s a wholesome alternative to traditional casserole dishes.
Endless customization: Swap ingredients easily to suit your taste—try different proteins, spices, or vegetables!
Family-approved: This dish is sure to please adults and kids alike, making dinner a delightful family affair.
For more fun options, check out this make-ahead vegan casserole recipe.
Stuffed Pepper Casserole Ingredients
For the Casserole
- Fat-free, reduced-sodium chicken broth – Provides moisture and flavor; use vegetable broth for a vegetarian option.
- Petite diced tomatoes (14.5 oz can) – Adds acidity and moisture; always choose undrained for best results.
- Uncooked quinoa (1 cup) – Base of the casserole, packed with protein and fiber; rinse if not pre-rinsed to avoid bitterness.
- Dried basil (1.5 tsp) – Offers aromatic flavor; substitute with Italian seasoning blend if desired.
- Dried oregano (1.5 tsp) – Enhances the Italian flavor profile.
- Garlic powder (0.5 tsp) – For savory depth; fresh minced garlic can be substituted.
- Kosher salt (0.25 tsp) – Balances flavor; adjust based on broth saltiness.
- Bell peppers (3 medium) – Main vegetable component; use any color or mix for a vibrant dish.
- Italian turkey sausage (8 oz) – Provides protein and flavor with less fat; swap with plant-based sausage for a vegetarian version.
- Reduced-fat shredded Italian cheese blend (0.5 cup) – Topping for creaminess; replace with mozzarella for a milder taste.
- Grated Parmesan cheese (0.25 cup) – Adds a rich flavor; omit for dairy-free options.
- Optional fresh basil – For garnish that adds freshness and visual appeal.
Let’s bring this delectable Stuffed Pepper Casserole to life in your kitchen!
How to Make Stuffed Pepper Casserole
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Preheat your oven to 400°F (204°C). This sets the perfect stage for baking your casserole to golden perfection.
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Combine in a baking pan: chicken broth, diced tomatoes, quinoa, basil, oregano, garlic powder, and salt. Stir well to ensure the flavors meld together beautifully.
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Prepare the bell peppers by cutting them into planks. Layer them cut-side up over the quinoa mixture, gently pressing uncooked sausage into each pepper for a delicious filling.
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Sprinkle the shredded Italian cheese blend on top, allowing some to tumble into the quinoa mix below. Then, shower parmesan cheese over the whole casserole for a delightful finish.
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Cover your dish with foil and bake for 30 minutes; remove the foil and bake uncovered for an additional 20-25 minutes. The casserole is done when the quinoa is cooked through and the cheese is bubbly and golden.
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Garnish with minced fresh basil if desired, adding a splash of color and fresh flavor to serve.
Optional: Sprinkle some crushed red pepper for a spicy kick!
Exact quantities are listed in the recipe card below.
What to Serve with Stuffed Pepper Casserole?
Elevate your meal by pairing this hearty dish with complementary flavors and textures.
- Crisp Green Salad: Fresh greens with a light vinaigrette will offer a refreshing contrast to the richness of the casserole. Consider adding some cherry tomatoes for a pop of color!
- Garlic Bread: A warm loaf of garlic bread will soak up any delicious sauce left on your plate, providing a delightful crunch alongside each bite.
- Steamed Broccoli: This nutritious side adds a lovely green element while balancing the hearty flavors of the casserole with its mild taste.
- Roasted Vegetables: Roasting brings out the natural sweetness of vegetables—try carrots, zucchini, or Brussels sprouts for a colorful array on your plate.
- Fruit Salad: A bright, fruit-based side brings a burst of sweetness that contrasts beautifully with the savory casserole, making each bite more enjoyable.
- Red Wine: A light red wine, like Pinot Noir, will enhance the Italian flavors of the turkey sausage and spices in your casserole, making it a delightful pairing.
- Chocolate Mousse: End your meal on a sweet note with a rich chocolate mousse; it’s an indulgent treat that complements comfort food beautifully.
- Herb-Infused Water: Infuse your water with mint or lemon basil for a refreshing drink that enhances the dining experience without overpowering the main dish.
Expert Tips for Stuffed Pepper Casserole
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Prep Ahead: Assemble the stuffed pepper casserole earlier in the day and refrigerate. Bake it directly from the fridge, adjusting time slightly.
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Quinoa Care: Always rinse quinoa before cooking to eliminate any bitterness. If you choose a pre-rinsed variety, skip this step for hassle-free cooking.
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Cooking Time Variance: Monitor your casserole’s baking time based on how soft you want the peppers; for crunchier peppers, reduce the time slightly during the last bake.
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Sausage Safety: Ensure the Italian turkey sausage is fully cooked before serving. Monitor it closely while baking as it continues to cook inside the peppers.
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Ingredient Swaps: Feel free to mix things up! Use zucchini instead of bell peppers or add other veggies to your stuffed pepper casserole for a nutritious boost.
Make Ahead Options
These Stuffed Pepper Casserole preparations are ideal for busy weeknights! You can assemble the entire casserole up to 24 hours in advance; simply cover it tightly with foil and refrigerate. This keeps the flavors fresh and ensures everything is ready when you are. To maintain the best quality, wait to sprinkle the cheese on top until right before baking, as this helps it achieve that golden, bubbly finish. When you’re ready to bake, simply remove it from the refrigerator and add 5-10 minutes to the cooking time to ensure everything is heated through. Enjoy a hassle-free, delicious dinner with your family, all while saving precious time!
Stuffed Pepper Casserole Variations
Customize your casserole and make it uniquely yours with these delicious ideas!
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Zucchini Swap: Replace bell peppers with zucchini slices for a fun, low-carb twist. The soft texture pairs beautifully with the quinoa filling.
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Spicy Kick: Incorporate spicy Italian turkey sausage or sprinkle crushed red pepper flakes for an added kick that will warm your soul.
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Cheese Variety: Experiment with different cheeses like sharp cheddar or creamy goat cheese for a flavor boost. Each cheese adds its delightful character to the dish.
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Add Greens: Toss in fresh spinach or kale for extra nutrition and color; they wilt down wonderfully and enhance the casserole with nutrient-rich goodness.
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Veggie Medley: Enhance with corn, black beans, or diced mushrooms, mixing textures and flavors. This combo creates a heartier feast that everyone will love.
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Herb Infusion: Fresh herbs like parsley or thyme can elevate the dish’s flavor profile. Toss them in just before serving for a burst of freshness.
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Quinoa Options: For a nutty crunch, consider using farro or millet in place of quinoa. They add unique textures while still delivering satisfying nutrition.
Feel free to mix and match these variations to create a dish that speaks to your taste buds!
Storage Tips for Stuffed Pepper Casserole
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Fridge: Store leftovers in an airtight container for up to 4 days. This will help preserve the flavors and freshness of your delicious stuffed pepper casserole.
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Freezer: Freeze the casserole in an airtight container or freezer bag for up to 3 months. Thaw overnight in the fridge before reheating, ensuring it retains its delightful taste.
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Reheating: Reheat in the oven at 350°F (175°C) for about 20-25 minutes, or in the microwave for quicker servings. Cover with a damp paper towel to prevent dryness.
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Make-Ahead Tip: Prepare the casserole ahead of time and store it in the fridge—just add 5-10 minutes to the total baking time when you’re ready to enjoy!
Stuffed Pepper Casserole Recipe FAQs
How do I select the best bell peppers for my casserole?
Absolutely! Look for firm bell peppers that are bright in color and free of dark spots or blemishes. Ideally, choose peppers that feel heavy for their size and have a smooth, shiny skin. I often mix green, red, or yellow for a colorful presentation that also enhances the dish’s sweetness.
What’s the best way to store leftover stuffed pepper casserole?
Store leftovers in an airtight container in the refrigerator for up to 4 days. This helps keep the flavors intact and makes for a delicious next-day meal. If you’re feeling adventurous, I recommend reheating them in the oven for about 20 minutes at 350°F (175°C) to regain some of that lovely crispness.
Can I freeze my stuffed pepper casserole?
Absolutely! You can freeze the casserole in an airtight container or freezer bag for up to 3 months. Just make sure to cool it completely first. When you’re ready to enjoy, thaw it overnight in the fridge. To reheat, place it in the oven at 350°F (175°C) for about 30-40 minutes until heated through. A damp paper towel on top can help keep it moist as it reheats.
What should I do if my quinoa is undercooked after baking?
No worries! If your quinoa isn’t tender, you can quickly remedy it. Just add a little more chicken or vegetable broth (about 1/4 cup), cover the casserole with foil, and bake it for an additional 10-15 minutes. This will help the quinoa absorb the moisture and soften up nicely.
Is this recipe suitable for those with dietary restrictions?
Yes! The stuffed pepper casserole is naturally gluten-free, especially when you choose gluten-free broth. For dairy-free options, simply omit the cheese or use a dairy-free cheese alternative. If you’re cooking for pets or individuals with allergies, always check ingredient labels and feel free to customize according to dietary needs with alternative proteins or vegetables.
Can I make this casserole vegetarian?
Very! Simply swap the Italian turkey sausage for a plant-based sausage or skip it altogether, adding more vegetables like mushrooms or spinach for flavor and nutrition. It retains that hearty essence while catering to vegetarian preferences!

Hearty Stuffed Pepper Casserole That Whips Up in One Pan
Ingredients
Equipment
Method
- Preheat your oven to 400°F (204°C).
- Combine in a baking pan: chicken broth, diced tomatoes, quinoa, basil, oregano, garlic powder, and salt. Stir well.
- Prepare the bell peppers by cutting them into planks. Layer them cut-side up over the quinoa mixture, gently pressing uncooked sausage into each pepper.
- Sprinkle the shredded Italian cheese blend on top, allowing some to tumble into the quinoa mix below. Shower parmesan cheese over the whole casserole.
- Cover your dish with foil and bake for 30 minutes; remove the foil and bake uncovered for 20-25 minutes until quinoa is cooked and cheese is bubbly.
- Garnish with minced fresh basil if desired.







