Spring lamb, garlic, rosemary and potato pies

Ingredients

• 75ml olive oil
• 600g diced lamb leg, cut into 2cm pieces
• 1 large brown onion, finely chopped
• 2 garlic cloves, crushed
• 2 potatoes, peeled, diced
• 2 sprigs rosemary
• 2 tablespoons plain flour
• 125ml red wine
• 375ml cups beef stock
• olive oil cooking spray
• 2 sheets butter puff pastry, thawed and lightly rolled
• 1 egg, lightly beaten