Heat the oil in a pan and fry the onion, carrots until the onions are soft.
2
Add the lamb to the pan and gently fry until cooked through.
3
Add the garlic and cook until fragrant.
4
Pour over the stock liquid, add the tomato purée, Worchestershire sauce and herbs. Stir then cover the pan with a lid and leave to cook on a bowl heat 20-30 minutes for the meat to soften.
5
Combine the corn flour with 2-3 tablespoons of water to produce a paste. Add to the savoury mince mixture to thicken the gravy.
6
Stir the frozen peas into the mince then take off the heat.
7
Place the mince in an oven proof dish. Allow to cool slightly to thicken the gravy. Carefully spoon the mashed potatoes onto the savoury mince.
8
Use a fork to press down the mashed potato and make lines in the surface of the mash. Bake in the oven 200C for 20-30mins until surface turns golden and crisps or place under a hot grill until potato topping is golden brown.
9
Mashed potatoes: Peel and cut the potatoes into cubes. Place in a large pan and cover with water. Boil the potatoes until soft. Drain the potatoes with a sieve or colander and return to the warm pan.
10
Mash the potatoes with a potato masher, potato ricer or a large wooden spoon until lump-free. Add butter and melt it, milk, pepper and (salt if required).