Leftover roast beef hash pie | Tesco Real Food

Ingredients

• 1 tbsp olive oil
• 1 large onion, peeled and finely sliced
• 1 celery stick, finely chopped
• 2 large carrots, peeled and finely chopped
• 2 leeks, trimmed and finely sliced
• 2 garlic cloves, peeled and crushed
• 2 tsp picked thyme leaves
• 1 tbsp tomato purée​
• ½ tbsp Worcestershire sauce
• 350g leftover roast beef, chopped into 2cm chunks
• 500ml beef stock or gravy
• 250g leftover cold potatoes, chopped into 2cm chunks
• 1 egg, lightly beaten
• 320g Tesco Finest ready rolled puff pastry
• steamed green vegetables, to serve (optional)