Step 1

Preheat the oven to 350°F

Step 2

Heat the oil in a large pan until hot.

Step 3

Season the ground lamb and fry in the oil over moderate to high heat for 2-3 minutes.

Step 4

Stir the onions and carrot into the mince then grate the garlic in as well.

Step 5

Add the Worcestershire sauce, tomato paste and herbs and cook for 1-2 minutes, stirring constantly.

Step 6

Pour in the red wine and reduce until almost completely evaporated.

Step 7

Add the chicken stock, bring to the boil and simmer until the sauce has thickened. Add salt and pepper to taste. Meanwhile, cook the potatoes in boiling salted water until tender.

Step 8

Drain potatoes and return to the hot pan over low heat to dry out briefly.

Step 9

Pass them through a potato ricer then beat in the egg yolks, cream and butter, followed by about 2 tbsp grated Parmesan. Check for seasoning.

Step 10

Spoon the lamb mixture into the bottom of an ovenproof dish.

Step 11

Using a large spoon, layer the mashed potato generously on top of the lamb mixture, starting from the outside and working your way into the middle.

Step 12

Top with remaining parmesan and season.

Step 13

Fluff up the mashed potato with a fork to make rough peaks.

Step 14

Bake in the oven for approximately 20 minutes, until bubbling and golden brown.