Here's how I ate for years.
Buy lots of dry grains. Brown rice. Quinoa. Wild rice. Barley.
Buy lots of cheap proteins. Canned beans. Whatever chicken is on sale. Tofu.
Always keep potatoes and onions on hand they last a while in the pantry.
Cook the dry grain, with diced onion. Pour beans on top. Hot sauce or whatever spices. Bake potatoes and any bonus protein you want to have.
Get tired of eating this with Sriracha? Use Frank. Or curry powder.