Ingredients

1 pound ground beef
1 medium onion, chopped
1 98-ounce package mini lasagna noodles
1 package pepperoni
1 28-ounce jar spaghetti sauce
2/3 cup Parmesan cheese, freshly grated
10 ounces cheddar cheese, grated
2 cups mozzarella cheese, grated
1 8-ounce package mini lasagna noodles

Instructions

Cook beef and onion until meat is browned, drain. Cook noodles until almost tender (you can substitute with rotini).
Combine all ingredients except Mozzarella cheese in layers in slow cooker. Sprinkle Mozzarella cheese over top. Bake on low for 5-7 hours, or on high for 2 hours.