I paged past this the other day while doing some legal research about parole hearings.
Title 15 California Code of Regulations Section 1247
(a) A disciplinary isolation diet that is nutritionally balanced may be served to an inmate...
(b) The disciplinary diet loaf shall consist of the following:
2-1/2 oz. nonfat dry milk
4-1/2 oz. raw grated potato
3 oz. grated carrots, chopped or grated fine
1-1/2 oz. tomatoe juice or puree
4-1/2 oz. raw cabbage, chopped fine
7 oz. lean ground beef, turkey, or rehydrated, canned, or frozen Textured Vegetable Protein (TVP)
2-1/2 fl. oz. oil
1-1/2 oz. whole wheat flour
1/4 tsp. salt
4 tsp. raw onion, chopped
6 oz. dry red beans, pre-cooked before baking (or 16 oz. canned or cooked red kidney beans)
4 tsp. chili powder
Shape into a loaf and bake at 350-375 degrees for 50-70 minutes.