Peanut butter isn’t so cheap these days, sadly.
A favorite supper of mine is potatoes and eggs. I take 2 potatoes, peel them and boil them, and chop them into chunks once cooked.
I fry the potato with onion, margarine (butter, if you’re milchig), and many spices- onion powder, paprika, black pepper, garlic powder, salt. Once the potato has some color, I add 2 beaten eggs and I eat this with ketchup and some toast with margarine.
Another thrifty meal I like are pierogies. Mrs. T perogen are a lifesaver to me since I can get them in any “stam” supermarket, and they have one parve variety and the rest are OU-D.
For about $3.99 a box, I am satisfied with about half the box and I eat them in the following derech: I boil them, and in a pan, chop an onion and fry it with butter or margarine and a little sugar. Once they get crispy, I eat with sour cream (either dairy or parve sour cream).