Boil lasagna noodles according to package instructions. Drain and lay flat on a clean towel. This prevents them from sticking while you prepare the sauce and cheese mixture.

Heat olive oil in a large pan over medium heat. Add onion and garlic. Cook for 3 minutes. Add ground beef and Italian sausage. Brown the meat and drain excess fat.

Pour marinara sauce into the meat mixture. Add dried basil, oregano, salt and pepper. Simmer for 10 minutes to combine flavors. Stir occasionally for even cooking.

In a bowl, mix ricotta cheese with one egg, a pinch of salt and half of the Parmesan cheese. Stir until smooth and creamy. This will be the creamy layer in your lasagna.

Spread a thin layer of meat sauce on the bottom of the baking dish. Layer noodles on top, then ricotta mixture, meat sauce and mozzarella cheese. Repeat layers until all ingredients are used.

Finish with a layer of mozzarella and remaining Parmesan cheese. Cover with foil and bake at 375°F (190°C) for 25 minutes. Remove foil and bake for another 20 minutes until cheese is golden.

Let the lasagna rest for 10 minutes before slicing. Garnish with fresh parsley. Serve warm with your favorite side dishes like garlic bread or salad.