Ingredients
Method
- Preheat oven to 400°F (200°C). Boil potatoes in salted water until fork-tender, 15-20 minutes. Drain and mash with warm cream, melted butter, and egg yolk. Season with salt and pepper.
- Heat olive oil in a skillet over medium-high. Brown ground lamb for 8-10 minutes; drain fat.
- Add onion, carrots, and celery; cook until softened, 5-7 minutes. Stir in garlic 1 minute.
- Mix in tomato paste 1 minute, sprinkle flour, stir 1 minute. Gradually add beef broth and Worcestershire sauce; simmer 5-10 minutes until thickened. Fold in peas, thyme, and rosemary. Adjust seasoning.
- Transfer filling to a 9x13-inch baking dish. Spread mashed potatoes evenly, creating ridges.
- Bake 20-25 minutes until golden and bubbly. Optional: broil 2 minutes for extra crispiness. Rest 10 minutes before serving.
Notes
Ensure potatoes are dry before mashing to prevent soggy topping. Fork ridges help achieve golden, crispy peaks.
