Jerusalem Artichoke Soup

• 2 lb (1 kg) Jerusalem artichokes, peeled and sliced
• 2 oz (50

As you prepare the artichokes, pop them into a bowl of water to which you have added 1 tablespoon of lemon juice; this will prevent them from discolouring.

Melt the butter in a saucepan, put in the drained artichokes and the onion, and season lightly with salt and pepper. Cover and cook gent