Prepare the egg noodles according to the package instructions until al dente, then drain them well to remove excess moisture.

In a large skillet over medium heat, add the ground beef. Cook it until fully browned, breaking it apart as it cooks.

In a large mixing bowl, combine the cooked noodles, browned beef, cream of mushroom soup, sour cream, onion soup mix, Sherry (if using), and Worcestershire sauce. Stir together until well-mixed.

Pour the flavorful mixture into a greased 9x13-inch baking dish, spreading it evenly.

Sprinkle the Gruyere cheese evenly over the top, followed by the crispy French's fried onions.

Place the baking dish in a preheated oven at 350°F (175°C). Bake for 30-35 minutes or until bubbly and golden brown.