Spiced braised beef pie

Name: Spiced braised beef pie
Ingredients: 2 tbsp vegetable oil; 1kg good-quality braising steak cut into 2.5cm chunks; 1 large onion finely chopped; 2 garlic cloves finely chopped; small piece ginger finely chopped; 2 tsp Sichuan peppercorn; 25g plain flour plus a little extra for dusting; 1 tbsp tomato purée; 3 medium carrots cut into large chunks; 2 star anise; 1 cinnamon stick; 100ml soy sauce; 3 red chillies left whole, but pierced; 375g pack ready rolled all-butter puff pastry; 1 egg beaten