A classic British comfort food featuring a savory lamb filling topped with creamy mashed potatoes, baked until golden and bubbly.
20 min prep
50 min cook
6 servings
480 kcal/serving
Ingredients
1 tbsp olive oil
1 large onion, chopped
2 carrots, peeled and diced
2 celery stalks, diced
2 cloves garlic, minced
1.5 lbs ground lamb
2 tbsp tomato paste
1 cup beef broth
1 tsp Worcestershire sauce
1 tsp fresh thyme leaves (or 1/2 tsp dried)
1/2 tsp salt
1/4 tsp black pepper
1 cup frozen peas
2 lbs potatoes (about 4 large), peeled and cubed
1/4 cup unsalted butter
1/2 cup milk
1/2 tsp salt (for potatoes)
1/4 tsp black pepper (for potatoes)
1 egg yolk (optional, for glazing)
Instructions
Preheat oven to 400°F (200°C).
Boil potatoes in salted water until tender, about 15 minutes. Drain and mash with butter, milk, salt, and pepper. Set aside.
While potatoes cook, heat oil in a large skillet over medium heat. Add onion, carrots, celery, and garlic; cook until softened, about 5 minutes.
Add ground lamb and cook, breaking up meat, until browned. Drain excess fat if necessary.
Stir in tomato paste, beef broth, Worcestershire sauce, thyme, salt, and pepper. Simmer for 5 minutes until slightly thickened. Remove from heat and stir in frozen peas.
Transfer lamb mixture to a 9x13-inch baking dish. Spread mashed potatoes evenly over the top. Use a fork to create ridges. If desired, brush with beaten egg yolk for a golden finish.
Bake for 25-30 minutes until filling is bubbly and top is golden. Let rest 5 minutes before serving.
Tips
For a richer mash, add 1/4 cup grated Parmesan cheese to the potatoes.
Make ahead: Assemble pie, cover, and refrigerate up to 2 days. Add 10 minutes to baking time.
Leftovers keep in the fridge for 3 days. Reheat in oven or microwave.