01 - Preheat 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 Italian sausage until fully browned, breaking apart with a spoon. Drain excess fat. Add the chopped onion and minced garlic, sautéing until softened, about 3 minutes. Stir in the marinara sauce, dried basil, dried oregano, salt, and pepper. Simmer the sauce for 5 minutes to meld the flavors, 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 blended.
04 - Scatter half of the shredded mozzarella evenly over the bottom of the pie crust. Arrange 4 cooked lasagna noodles over the cheese layer, trimming them as needed to fit the dish.
05 - Spread half of the ricotta cheese mixture evenly over the noodles, followed by half of the meat sauce. Repeat the layering with the remaining 4 noodles, the rest of the ricotta mixture, and the remaining meat sauce.
06 - Sprinkle the remaining mozzarella and the rest of the grated Parmesan over the top of the pie.
07 - Cover the edges of the pie crust with aluminum foil to prevent overbrowning. Bake for 40 to 45 minutes until the filling is bubbly and the top is golden brown.
08 - Remove from the oven and let the pie rest for 10 minutes before slicing into wedges. Serve warm.