Thrift soup.

A can of black beans, even if it's a black bean soup, isn't enough for a meal. Neither is a can of tuna, even if the tuna's packed in oil. But a can of black bean soup, a can of oil-packed tuna, a thinly sliced onion, a couple of diced cloves of garlic, some olive oil, and a bit of basil is plenty for a wonderful meal, especially if you've been cleaning out the cupboards and discovering things which were only gathering dust.

It was, without exaggeration, the best meal I've had all year.