Cook the lasagna noodles according to package instructions until al dente, about 8-10 minutes. Drain and rinse with cold water. Set aside.

In a large skillet, brown the ground beef and ground Italian sausage, breaking apart with a wooden spoon, for about 8 minutes. Add diced onion and minced garlic, cooking for 3 minutes. Stir in marinara sauce and let simmer for 10 minutes.

In a mixing bowl, blend ricotta cheese, softened cream cheese, sour cream, and eggs until smooth. Season with salt and pepper.

In a greased baking dish, layer 1 cup of meat sauce, 4 noodles, half of the cheese mixture, half of the meat sauce, a third of mozzarella, repeating until all layers are finished. Top with remaining mozzarella and parmesan cheese.

Cover with foil and bake at 350°F for 25 minutes. Remove foil to brown cheese for an additional 20 minutes.

Let lasagna rest for 15 minutes. Garnish with fresh basil before serving.