Any food advice for someone poor ?

I have $50 right now.. but my wife and I need something to hold us over this week. Maybe a little better than ramen again. We were kinda pushed into adult hood on our own and just have each other. We’re learning as we go and welll turns out I don’t know the first thing about managing money when it comes to food. One week of the month we’ll be eating really good and the rest of the time we’re surviving off scraps and ramens. Any tips ?