Dried beans. Their cheap AF. Nutritious AF. I make up a pot of soup every couple of days. Soak you beans the night before. Boil next day.

Start a new pot off with butter. Sauteed up onion, carrot, and/or celery(all cheap AF, all optional). Add In meat if you like. Sear outsides but don’t worry about cooking all the way through. Add chicken stock (or water). Simmer covered 30 min-ish. Add in frozen spinach, cook another 5. Salt and season to taste.

Congrats! You just made a pot of bomb ass soup. For like 3$! You can eat for days off that pot. Delicious AND nutritious. Your gut likes variety, give it to it.