In a large skillet, heat the Olive Oil over medium heat. Add the Ground Beef, Italian Sausage, Onion, and Garlic, and cook until the meat is no longer pink, about 6-8 minutes.

Drain any excess fat from the skillet. Return the meat to the pan and stir in the Pasta Sauce. Heat the mixture until it's well combined and warmed through.

Grease a 13x9-inch baking dish. Spread 1 cup of the sauce on the bottom. Layer half of the sliced Chicken and Pepperoni, followed by 2 cups of sauce and half of each shredded cheese. Repeat the layers.

Cover the dish and bake for 25 minutes. Uncover and bake for an additional 20-25 minutes until the cheese is browned and bubbling. Let the lasagna stand for 15 minutes before serving.