Preheat oven to 350 degrees. Brown hamburger and onions together; drain. In separate pan cook noodles. Add to the hamburger/onion mixture, the spaghetti sauce. Bring to a hot boil and turn off. Stir in cottage cheese.
In 3 oblong dishes layer (2 layers) noodles, sauce, cheese and noodles, sauce, cheese. Cook 1 pan, freeze the other 2. Tastes like you cooked it all day. Bake approximately 30 minutes until golden brown.