While hunting last week, I used instant potatoes, thinned with powdered milk to make a chowder (just caught crawfish, beer, bacon, and bits from a veggie platter). Filling and warming in a fog belt.
I've seen some vegans use it when making seitan mock meats. Mock meats usually aren't just entirely wheat gluten, you have to add seasonings and some ingredients like mashed beans or beets for the texture. There's various recipes for "poteitan" online.