Directions
Preheat the oven to 375 degrees. Cook the lasagna noodles according to package directions and drain. Heat olive oil in a skillet over medium heat. Cook the onion until softened, then add the garlic. Add the ground beef and cook until browned. Stir in the marinara sauce, Italian seasoning, salt, and black pepper. In a bowl, combine the ricotta cheese, egg, and half of the Parmesan cheese. Spread a thin layer of meat sauce in a baking dish. Layer noodles, ricotta mixture, mozzarella cheese, and meat sauce. Repeat the layers until all ingredients are used, finishing with mozzarella and the remaining Parmesan cheese. Cover with foil and bake for 40 minutes. Remove the foil and bake for 15 more minutes until bubbly and browned. Let rest for 15 minutes before slicing.