White Haricot Bean and Tomato Salad

• 2 x 410 g tins white haricot beans, drained, or 200 g dried white haricot beans
• 400

If you’re using dried beans, soak them overnight in a saucepan of cold water. The next day, drain them, rinse well and return to the pan. Cover with water, bring to the boil and simmer for 1 hour. Skim off any froth that rises to the top during cooking. Drain and cool.

Cook the potatoes in their skins in a pan of simmering water for 20 minutes. Drain and allow to cool, then cut into wed