tuna and haricot bean salad

The ultimate storecupboard lunch. Except we ate it for tea as a side dish, together with some green salad and a pissaladiere.

You'll need:

a tin of haricot beans
a tin of tuna (preferably in oil)
a small onion, finely sliced
juice of half a lemon
black pepper

Drain the tuna, but keep the oil. Drain the beans and rinse. Mix the tuna and beans together in a large bowl, and add the sliced onion. Add some of the tuna oil and all of the lemon juice, and season generously with lots of black pepper.