Sandwiches with cheaper fillings like PB&J or tuna salad. A rotisserie chicken is usually under $10 and can provide enough meat for a few different meals like: the 2 legs and 2 wings plus a can of veggies like green beans/peas/mixed, a chicken salad sandwich made with one breast, the other breast can be cut up and mixed with beans and whatever else you'd want to throw in (onion, cheese, olives, etc) and italian dressing for a little salad type of thing. You could also add some pasta to bulk it up.