Myself, I get cans of beans, from the grocery store, such as black beans, Red kidney beans and garbanzo beans. They aren't cheap-cheap, but not too pricey either, and they have some protein and nutrients, to feel satisfied.
I drain and often rinse them, to lower the salt they've added in, and myself, I have to put them into the blender, but most people do not need or want to do that.
And many people hate them, so I wouldn't suggest it for any of you, who do.



Pairing them with an egg, or with a smaller amount than usual, of canned salmon or tuna, or cooked chicken, is more filling, and stretches those other foods longer, which saves money.
I used to cook my own beans, but not now. Can't handle all the movements and the steps, at this point.
For many with disabilities, it isn't safe or possible to cook much from scratch.