Serves 6
Ingredients
- A knob of butter
- 1 onion, chopped
- 1 lb (500 g) minced lamb
- 2 lb (950 g) cooked mashed potatoes
- A tablespoon of plain flour
- 16 fluid ounces (450 ml) vegetable stock and left-over gravy
- 1 tsp tomato purée
- 5 ounces (150 g) grated mature Cheddar cheese
