Ingredients
Method
Step-by-Step
- Heat the oven to 400°F (200°C).
- Place the potatoes in a saucepan, cover with cold salted water, and bring to a boil. Cook for 15-18 minutes, until fork-tender.
- Drain the potatoes well and mash with the butter, warmed milk, salt, and black pepper. Set aside.
- While the potatoes cook, heat the oil in a large skillet over medium-high heat. Add the onion and carrots and cook for 5-7 minutes.
- Add the garlic and ground lamb. Cook for 6-8 minutes, breaking up the meat, until browned, and drain excess fat if necessary.
- Stir in the flour and tomato paste and cook for about 1 minute.
- Add the stock, Worcestershire sauce, thyme, salt, and pepper. Simmer for 5-8 minutes, stirring occasionally, until thickened.
- Stir in the frozen peas.
- Transfer the filling to the baking dish and spread the mashed potatoes evenly over the top. Rough up the surface with a fork.
- Bake for 20-25 minutes, until bubbling around the edges and golden on top. Rest for 5-10 minutes before serving.
Notes
Cook the filling until fairly thick before assembling so the potato topping stays in place. Warm milk makes smoother mashed potatoes, and letting the drained potatoes steam-dry briefly helps prevent a watery topping. For deeper browning, brush the potatoes with a little melted butter and broil for 1-2 minutes, watching closely.
