Traditional Shepherd's Pie

INGREDIENTS

For the potato topping:

2 lb

Yukon gold potatoes (peeled and cut into wedges)

4 tbsp

unsalted butter (melted)

1/4 cup

milk (warm)

1/2 tsp

salt (to taste)

1/4 tsp

ground black pepper (to taste)

For the filling:

1 tbsp

vegetable oil

1 1/2 lb

ground lamb

1 tsp

salt

1/4 tsp

ground black pepper

7 oz

yellow onion (chopped)

garlic cloves (peeled and grated or finely chopped)

1 tsp

fresh thyme

3 tbsp

tomato paste

1 lb

carrots (peeled and diced small)

6 oz

parsnip (peeled and diced small)

1 cup

frozen peas

3/4 cup

Guinness

2 tsp

Worcestershire sauce

1 cup

beef stock (low sodium )