you can make Hiyayakko. also olives, nuts, and pickles, especially the asian pickles that come in small retort pouches. maybe you have a way to make yogurt or sour cream. there are also a ton of cold soak backpacking recipes, though many use expensive dehydrated stuff, but a few are done with normal stuff like grits or oats: https://andrewskurka.com/section/food-nutrition/