For the filling
01 -
1 tbsp olive oil
02 -
1 ½ lb (680 g) ground lamb
03 -
1 medium yellow onion, diced
04 -
2 carrots, diced small
05 -
2 celery stalks, diced small
06 -
3 garlic cloves, minced
07 -
2 tbsp tomato paste
08 -
2 tbsp all-purpose flour
09 -
1 cup (240 ml) beef broth
10 -
1 tsp Worcestershire sauce
11 -
1 tsp fresh rosemary, chopped
12 -
1 tsp fresh thyme leaves
13 -
1 cup (150 g) frozen peas
14 -
Salt and black pepper
For the potato topping
15 -
2 ½ lb (1.1 kg) russet potatoes, peeled and cut into chunks
16 -
4 tbsp unsalted butter
17 -
¼ cup (60 ml) whole milk, warmed
18 -
2 egg yolks
19 -
½ tsp salt
20 -
¼ tsp white pepper