How to make Watercress soup - howtothings.net

Ingredients

• 1 onion, chopped
• 15g/ 1⁄2oz butter
• 350g/12oz watercress, roughly chopped
• 1 tablespoon plain flour
• 1.2 litres/2pt vegetable stock
• 1/4 teaspoon grated nutmeg
• 50ml/2fl oz single cream
• 2 eggs, hard-boiled and finely chopped