New Zealand Potato Top Pie

Ingredients

• 400 g lean mince beef (I used 10% fat)
• 2 tbsp oil
• ½ large onion, thinly diced
• 1 garlic clove, minced
• 4 tbsp plain flour, (30gr)
• 500 ml beef stock
• 1 tbsp tomato paste
• ½ tsp Worcestershire sauce
• 1 tbsp fresh chopped rosemary, stalks removed
• 3 sheets of shortcrust pastry (store bought)
• baking beads (to blind bake)
• 750 g potatoes for baking (Desiree, Yukon)
• ¼ cup cream (60ml)
• 2 tbsp salted butter (60gr)
• ¼ tsp nutmeg
• 2 egg yolks
• ¼ tsp black pepper
• oil spray