Could you make soups that you can drink, like tomato, split pea, etc? Oatmeal bars would be great for helping your supply. I would make sure to have lots of protein options to keep up your energy -- hard boiled eggs, string cheese, peanut or nut butter on crackers, yogurt, toasted chick peas.
What about cut up fruit or veggies (celery with peanut butter, carrots, broccoli/cauliflower, peppers).
Mama to DS 10/04, DD 12/06, and DD 11/09 my baby
Missing DS 10/08