I survived on fruit growing in my neighborhood and a potato a day for a while. I was extremely broke. During this time, I walked between two grocery stores logging prices for basics between the two and buying the cheaper items to stretch my budget. I know what it means to be desperate to make it work on low or no funds. Keep your head up cause life can improve. I wish you the best.
Russet potatoes are filling and cheap. They can be seasoned for flavor with whatever you might have. Pour oil over one and sprinkle whatever seasoning you have, wrap it in aluminum foil and bake for 63 minutes at 425°. Or do the cheaper version without spices and aluminum foil. It’s still a large portion of food.
Noodles are cheap. I have an adequate budget now, but I still eat noodles for breakfast almost every day (M-F) cause I like them and they’re easy. Distinguish between rice noodles and pasta noodles (wheat). They aren’t the same and probably provide different nutrients. Eggs are also fairly cheap (except when they weren’t) and can be cooked a bunch of ways. Rice is cheap, though a westener’s diet might find it bland over time. Beans are supposed to be a top protein source. If you eat red meat, probably look for hamburger and find ways to work that in.
Anywhere