In a large saucepan, combine ground beef, sausage, and onion. Cook until browned and crumbly; drain. Add spaghetti sauce, tomato sauce, garlic, salt, and Italian seasoning. Remove from heat and allow to cool.
Meanwhile, in a medium size bowl, stir together ricotta, Parmesan, and parsley.
Lightly spray 2 8x8-inch disposable foil pans with cooking spray. Spread a bit of sauce in the bottom of each pan. Top with a layer of 2-3 noodles (breaking noodles if needed). Spoon about ¾ cup sauce over the noodles. Top each pan with dollops of the cheese mixture and evenly sprinkle with mozzarella cheese. Repeat.
Cover with plastic wrap and aluminum foil. Label and freeze.
When ready to cook, thaw in refrigerator overnight.
Preheat oven to 350℉. Remove foil and plastic wrap and then cover again with foil. Bake 45 minutes. Remove foil and continue baking an additional 15 minutes. Let stand 10 minutes before serving.