Curried beef pies

Ingredients

• 2 tablespoons olive oil
• 1 kilogram gravy beef (boneless shin), trimmed
• 1 large_piece (200g) brown onion, chopped coarsely
• 2 cloves garlic, crushed
• 2 tablespoons plain (all-purpose) flour
• 2 tablespoons mild curry powder
• 1/4 teaspoon chilli flakes
• 1 litre (4 cups) salt-reduced beef stock
• 1 tablespoon light brown sugar
• 1 egg, beaten lightly
• 1 1/2 cup (225g) plain (all-purpose) flour
• 100 grams cold butter, chopped
• 1 egg
• 1 tablespoon iced water, approximately
• 2 sheets puff pastry