This is another ridiculously quick and easy supper, and pretty cheap too (depending where you shop) – certainly well under £1 per serving. Works well with runner beans as well.

serves 2:

1 pack green beans (89p from Aldi, I think)
125g of pasta (fusilli, quills, whatever – Aldi fusilli is 49p for 500g, so that’s (counts on fingers) 12.5p)
1 chopped onion (20p)
1 dessert spoon (ish) of olive oil
lemon juice – a bottle is easier, and cheaper, than fresh
black pepper
about 25g grated parmesan (35p?)

Top and tail the beans, while you put a decent amount of water on to boil. When it has, put in the pasta and set a timer (mental, if necessary) for 10 minutes. I put the beans in that pot when there was eight minutes left, which left a nice crunch to them.

While the beans and pasta are cooking, cook the onion off in the olive oil. Add to the drained pasta/bean mix, stir in a good slug of lemon juice, the parmesan, and some freshly ground black pepper.

Light, quick, simple, healthy, cheap. Vegetarian, and vegan if you leave out the cheese.