Steak, Leek & Mushroom Pie with Guinness

Ingredients

• 1 tbsp vegetable oil
• 700g stewing beef, cut into bite-sized pieces
• 2 trimmed leeks, sliced
• 1 onion, coarsely chopped
• 2 large carrots, peeled and diced
• 250g mushrooms, coarsely chopped
• 100g bacon (about 3 rashers), coarsely chopped
• 1 tsp dried thyme
• 2 garlic cloves, crushed
• 2 tbsps plain flour
• 330-ml can Guinness
• 2 tbsps Worcestershire sauce
• 1 bay leaf
• A large handful of fresh parsley leaves, chopped
• 375g ready-rolled puff pastry
• Melted butter or milk, to brush
• Sea salt
• freshly ground black pepper