BBC Food - Recipes - Avgolemono soup

Ingredients

• bones from a 1.5kg/3lb 5oz chicken , or 450g/1lb wings and/or drumsticks, or leftover bones from a roasted chicken
• 1 large carrot , roughly chopped
• 2 celery sticks, roughly chopped
• 2 leeks , washed and sliced
• 2 bay leaves
• 2 sprigs thyme
• 8 free-range eggs
• 1.5 litres/2½ pints chicken stock
• 1 tsp salt
• 1 skinless chicken breast , weighing about 170g/6oz
• 100g/3½oz orzo pasta
• 3 tbsp lemon juice
• 30g/1oz butter
• small handful chopped parsley
• cayenne pepper