Maple Lamb Pie - Maple from Canada

Ingredients

• 3 tbsp olive oil
• 500g diced lamb
• 1 red onion, chopped
• 1 glass red wine
• 3 tbsp pure maple syrup (preferably dark syrup for its robust taste)
• 4 garlic cloves, thinly sliced
• 500g potatoes, peeled, cubed
• 2 carrots, peeled, sliced
• 3 tbsp tomato paste
• 4 tbsp gravy powder
• 1 beef stock cube
• 4 cups water
• 2 tbsp Worcestershire sauce
• 2 tbsp fresh rosemary, chopped
• 1 tbsp fresh thyme, chopped
• 2 tbsp cornflour
• 1 puff pastry sheet, ready rolled
• 1 egg, lightly beaten