With only two of us I like to make TV dinners with the leftover meat and gravy in one compartment, mashed potatoes in another and vegetable in the third. Just bought microwave containers for this and always cook extra potatoes and vegetables. I count on one meal of "leftovers", slice for lunch sandwiches and do a couple to "TV style" dinners to freeze - usually uses up a roast. Keep stock on hand to extend the gravy.

Make pot pie.
sandy