Pasta bakes and Shepherds Pie type things are always good, Stews/casseroles, moussaka, tuna mornay, meatballs, quiche.

I like sandwich mixes too - tuna mix, chicken mix - cooked meat shredded and chopped super fine, super fine dice celery, carrots, red onions and parsley mixed with mayo. Curried egg mix and gherkin spread is a personal fav Keep it in the fridge for about 3 days and use it in sandwiches.

Roast pumkin and chickpea salad, pasta salads. (Don't freeze them but you can make them up in advance and mix them each day)

HTH