Nibblous | chicken with white wine vinegar

Ingredients

• 1 chicken or 8 chicken pieces
• 5 or 6 unpeeled cloves of garlic
• 5 tablespoons white wine vinegar
• ½ pint dry white wine
• 2-3 tablespoons Armagnac (Cognac will do - buy a miniature if none in the house)
• 2 teaspoons Dijon mustard (no other variety will do, but be stingy with the amount)
• 1 teaspoon tomato purée
• 150ml (¼ pint double cream)
• 60g (2 ozs) butter - bring to room temperature
• 2 ripe and firm raw tomatoes (for tomates concassées - see tip below)
• parsley or chervil for garnish