Prepare the Meat Sauce: In a skillet over medium heat, cook the ground beef until browned, about 5-7 minutes. Then add the diced onion and cook until soft, followed by the minced garlic for an additional minute. Mix in the marinara sauce, crumbled bacon, Italian seasoning, and smoked paprika. Season with salt and pepper, then simmer for 10 minutes until flavors meld.

Make the Parmesan Garlic Béchamel: In a saucepan, melt the unsalted butter over medium heat. Whisk in the flour to create a roux, cooking for about a minute. Gradually add the milk while continuously whisking until the mixture thickens, approximately 5 minutes. Stir in the grated Parmesan and garlic powder, seasoning with salt and pepper.

Assemble the Lasagna: Preheat your oven to 375°F (190°C). In a baking dish, layer the meat sauce, followed by lasagna noodles, béchamel, mozzarella, and cheddar cheese. Repeat these layers, finishing with a layer of cheeses topped with grated Parmesan.

Bake and Rest: Cover the dish with foil and bake for 30 minutes. Then, remove the foil and bake uncovered for an additional 15 minutes until the top is bubbly and golden brown. Allow to rest for 10 minutes before slicing to set the layers.