The Best Shepherds Pie

Directions

1. 1
   Preheat the oven to 350F/175C (Gas Mark 4).
2. 2
   Heat the olive oil in a large skillet over medium heat.
3. 3
   Add the onion and carrots and cook for 8 to 10 minutes or until they are soft but not browned.
4. 4
   Raise the heat to high, add the lamb, and cook until well browned.
5. 5
   Stir in the tomato paste and mustard, then add the stock.
6. 6
   Reduce the heat to low, season to taste with salt and pepper, and simmer for 15 to 20 minutes or until the stock is mostly but not completely evaporated.
7. 7
   Transfer the meat mixture to a round or rectangular ovenproof baking dish.
8. 8
   Cover the meat with mashed potatoes, flattening the top with a knife.
9. 9
   (Make a wave or crosshatch pattern in the top of the potatoes, if you like.)
10. 10
    Brush the top with melted butter, then bake for 50 minutes.