01 - Preheat your oven to 375°F. Position the rack in the center of the oven for even baking.
02 - In a large skillet over medium heat, cook the ground beef and sausage, breaking apart with a wooden spoon, until fully browned throughout. Drain off any excess fat. Add the chopped onion and minced garlic; sauté until the onion is translucent and fragrant, about 3 minutes. Stir in the marinara sauce, dried basil, dried oregano, and season with salt and pepper. Let the sauce simmer gently for 5 minutes to allow the flavors to meld, then remove from heat.
03 - In a medium mixing bowl, combine the ricotta cheese, eggs, a pinch of salt, and half of the grated Parmesan. Stir until smooth and well incorporated.
04 - Scatter half of the shredded mozzarella evenly across the bottom of the fitted pie crust. Arrange 4 cooked lasagna noodles over the cheese layer, trimming them as needed to fit snugly inside the dish.
05 - Spread half of the ricotta mixture evenly over the noodle layer, followed by half of the meat sauce. Repeat the layering with the remaining noodles, the rest of the ricotta mixture, and the remaining meat sauce.
06 - Sprinkle the remaining mozzarella and the rest of the Parmesan evenly over the top of the assembled pie.
07 - Cover the exposed edges of the pie crust with aluminum foil to prevent overbrowning. Bake on the center rack for 40 to 45 minutes, until the cheese is bubbly and deeply golden on top.
08 - Remove from the oven and let the lasagna pie rest for 10 minutes before slicing into wedges. This allows the layers to set for cleaner portions.