Smooth liver pâté

• 1 lb (450 g) chicken livers
• 1 onion
• 1

Trim the chicken livers. Peel and finely chop the onion and garlic, if using it. Melt 2 oz (50 g) of the butter in a saucepan over low heat, add the onion and fry gently for 5 minutes to soften but n