Just about anything really...stews, soups, pastas...

When you do meats like chicken breasts or steaks, try marinating an extra one, cooking it and putting it in his box with some salad and a fresh roll instead of a dinner-type meal.

Cooking some extra pasta and making a simple pasta salad from it is a good alternative - some sliced cold meats, sundried tomatoes and the oil from them, fresh parsley and it is super tasty.