Step 1: In a large pot, brown the ground beef and Italian sausage over medium heat. Drain excess fat.
Step 2: Add the diced onion and minced garlic to the meat. Sauté for 5 minutes until soft and fragrant.
Step 3: Stir in the crushed tomatoes, tomato paste, red wine, oregano, salt, and pepper. Simmer on low for 45 minutes to develop the flavor.
Step 4: While the sauce simmers, boil a large pot of salted water and cook the lasagna noodles according to package directions. Drain and set aside.
Step 5: In a medium bowl, combine the ricotta cheese, egg, parsley, and 1 cup of the mozzarella cheese. Mix well.
Step 6: Preheat your oven to 375°F (190°C).
Step 7: Spread 1 cup of meat sauce in the bottom of a 9x13 inch baking dish. Layer with 3-4 noodles.
Step 8: Spread half of the ricotta mixture over the noodles, then top with a layer of meat sauce and a sprinkle of Parmesan.
Step 9: Repeat the layers (noodles, ricotta mixture, meat sauce, Parmesan) and finish with a final layer of noodles.
Step 10: Top with the remaining meat sauce and the rest of the shredded mozzarella cheese.
Step 11: Cover with foil and bake for 25 minutes. Remove foil and bake for an additional 15-20 minutes until the cheese is bubbly and golden.
Step 12: Let the lasagna rest for 15-20 minutes before slicing to allow the layers to set.