Any more ideas for cooking ahead and freezing.

I will be catering for 8 for a week including two vegetarians and two 6 year olds. I have frozen soup plus beef olives and spag bog but looking for other recipes to freeze. I want to enjoy the company and not spend my week in the kitchen.
I would also like to know if other grans let roast meat rest after cooking that is something I have never done . Do you fry mushrooms before adding them to a casserole . I always have but wondered if I need to . Thanks for any ideas .