Lettuce, Cucumber and Mint Soup

• 45–55 g butter
• 140 g peeled diced potatoes
• 110 g

Melt the butter in a heavy saucepan. When it foams, add the potatoes and onions and turn them until well coated. Sprinkle with salt and freshly ground pepper. Cover and sweat on a gentle heat for 10 minutes, until soft but not coloured. Add the cucumber and toss it in the butter. Add the stock, bring to the boil and cook until the potatoes, onions and cucumbers are completely cooked. Add the le