Mixed game pie in red wine

Ingredients

• 2 x Field & Flower packs of diced mixed game (400g)
• 200g Field & Flower smoked bacon lardons
• Olive oil
• 1 red onion, thinly sliced
• 2 carrots, peeled and chopped
• 1 clove garlic, crushed
• 150g chestnut mushrooms, halved
• 3 tbsp plain flour
• 300ml red wine
• 600ml chicken stock
• 2 bay leaves
• Small handful each of fresh thyme, rosemary and flatleaf parsley
• 320g ready rolled all butter puff pastry
• 1 egg, beaten
• Steamed kale and buttered mash, to serve