Chicken Leek and Mushroom Pie – Cooks Matches

Ingredients

• 500g boneless chicken thighs
• 300g sliced leeks
• 200g chestnut mushrooms stem removed and quartered
• 200g button mushrooms stem removed and quartered
• 2 chicken stock cubes
• 1l water
• 10 chopped tarragon leaves
• 20g chopped parsley
• 2 tsp Dijon mustard
• 60g unsalted butter
• 60g plain flour
• 320g pre-rolled puff pastry
• 300g diced onion
• 3 garlic cloves peeled & chopped
• vegetable oil
• Salt and pepper to taste