Boil the lasagna sheets per the package instructions. In a small skillet over medium high heat, add in the onions and cook the ground beef and Italian sausage until no pink is visible. Drain off the excess grease (set some of the meat aside for topping) and add in 20 pepperoni slices, ½ cup of bacon crumbles and stir in the marinara sauce.
Drain the water from the cooked lasagna sheets then add them to the meat mixture. Sprinkle the Mozzarella cheese on top followed by the remainder of bacon crumbles and meat that you set aside. Place the remainder of pepperoni slices on top then bake at 350 for 10-15 minutes until the cheese is melted. Serve & enjoy!