By rice and beans I didn't mean a recipe with literally two ingredients. I'm assuming you put stuff like peppers and onions in the beans. Or meat if you like. I'm also not saying you should eat rice and beans for every meal; just that most people have a default, and this is a good one if you're short of money.
When I was knocking on doors for a living, rice and beans kept me alive.
Of course you need to eat other ingredients, too. But r&b is a good default, it will keep you from starving, and it costs even less than ramen if you buy in bulk.
