Potatoes are good, you can do a lot with them. I like to cut them up into pieces then coat with olive oil and season them good, then bake them, when they're done I like to dip them in ketchup. They taste really good that way. Or you could make potato pancakes which are good too. Or just a classic baked potato with whatever toppings you want. I know that's not really complete meals but potatoes are pretty filling