Easy tarragon chicken

Ingredients

• 20g unsalted butter
• 200g lardons or bacon cut into 1cm pieces, smoked or unsmoked
• 8 free-range chicken thighs
• 1 onion, halved and thinly sliced
• 2 bay leaves
• 1 leek, halved and thinly sliced, white and pale green part only
• 1 large carrot, cut into 1cm dice
• 1 celery stick, trimmed and diced
• 300ml white wine
• 500ml chicken stock
• 3-4 whole sprigs of tarragon and about 2-3 tbsp freshly chopped tarragon leaves
• 130g petits pois (frozen is fine)
• 100g crème fraîche
• Greens and cooked rice or potatoes to serve
• You’ll also need
• Large hob-safe casserole