For the chicken fricassée 4 organic or free range chicken drumsticks and thighs or a whole chicken cut into 10 pieces 1 tbsp olive oil 5 tbsp good-quality red wine vinegar 15g unsalted butter 100ml dry white wine 4 garlic cloves, peeled but left whole 1 ripe medium tomato, finely chopped 2 sprigs fresh tarragon,...