Fricassee of Chicken Legs with Lyonnaise Potatoes

Name: Fricassee of Chicken Legs with Lyonnaise Potatoes
Cuisine: United Kingdom
Ingredients: 1 tablespoon chopped flat-leaf parsley; 125 g butter; 2 onions, thinly sliced; 3 garlic cloves, thinly sliced; Sprig of savory or thyme; 200 ml double cream; 2 bay leaves; 200 ml white wine; 6 whole chicken legs, cut into thighs and drumsticks; Salt and freshly ground black pepper; 500 ml chicken stock or water; 2 tablespoons olive oil; 6 large Maris Piper potatoes; 1 large onion, finely chopped; 100 ml white wine vinegar; 2 garlic cloves, crushed; 50 g butter; Good Splash of vegetable oil