Unsolicited diatary advice
@cyberboy @iro_miyaBeans are a great option for protein and fiber. Very flexible, from tacos to soups to just beans and rice. Canned beans are already cheap but dried are even cheaper and can taste better. You just have to remember ahead of time to soak them.
I do enjoy the meatless alternatives that try to mimic it but yeah they are expensive so I usually eat more beans, tofu, tempeh, and seitan.