I brown a pound of ground beef and mix that with about a cup of parmesan cheese and one box of cooked penne, or any tube noodle. Then I mix in a jar of pasta sauce...I like the 4 cheese or ricotta parmesan by Preggo. Put it in a 13x9 dish, I have used those foil ones too, and top it with mozarella. You can freeze it like that and then pop it in the oven when you are ready to eat. I usually bake it at 375 for 30 min, but if it is frozen, it will probably take longer. You can also mix in some ricotta or other Italian cheese when you mix in the parmesan if you want.