On Tuesday we made a beef stew. There was less than a pound of meat in it and some potatoes, onions, and a few limp carrots and celery. We had some leftovers but not enough for a whole meal. So I went out and bought three potatoes, cut up a leftover half of an onion, and added the rest of my still limp but serviceable carrots and celery.
Although the incarnation of this beef stew is definitely more vegetable stew than beef, we had a perfectly easy and delicious meal for the cost of three potatoes. I never mind using leftovers, they are the best way to stretch your food dollars.