Pulled Lamb and Vegetable Pie

Ingredients

• 1 kg leftover lamb
• oil
• 5 ml (1 teaspoon) fine coriander
• 3 ml (generous ½ teaspoon) mustard powder
• 15 ml (1st) vinegar
• 1 tsp crushed black pepper
• ½ tsp white pepper
• 1 small onion - chopped
• 250 ml water
• 500 g frozen vegetables of your choice - defrosted
• 1 tbsp mushroom soup powder
• 2 - 3 tbsp cornflour
• A good shot of lemon juice
• 1 roll (400g) frozen puff pastry, thawed
• egg yolk and water mixture.