I pretty well freeze anything that can go with pasta or rice. Just make up and freeze the sauce and write whatever goes with it on the lid to be cooked while you are heating the sauce.

eg: Tuna mornay, tomato based sauce with chopped sausages, chicken stroganoff, taco (mexican) mince and beans (can have with corn chips or wedges like nachos),. mild curries. Anything really.

HTH