Mary Berry's chicken casserole recipe

Ingredients

• 1 pinch each salt and black pepper
• 250 g dry cured bacon, snipped into small pieces
• 2 large onions, chopped
• 8 skinless chicken thighs, bone in
• 2 tbsp sunflower oil
• 30 g plain (all-purpose) flour
• 150 ml hot chicken stock
• 150 ml dry white wine
• 2 large sprigs of thyme
• 1 small bunch of sage, 6 leaves removed for garnish
• 2 bay leaves
• 200 g small chestnut mushrooms, quartered
• 100 g full-fat crème fraîche
• 1 knob of butter
• 1 small bunch of parsley, chopped