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Hairy Bikers Leftover Lamb Shepherd’s Pie

Hairy Bikers Leftover Lamb Shepherd's Pie
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A rich, comforting shepherd’s pie that transforms leftover roast lamb into a deeply savory filling, topped with creamy, golden mashed potatoes. The lamb is simmered with aromatic vegetables, red wine, and Worcestershire sauce for a complex, meaty flavor, while the cheesy potato crust provides the perfect textural contrast.

Ingredients

Scale
  • For the Mashed Potato Topping:
  • 2 lbs Yukon Gold potatoes, peeled and cut into 1.5-inch chunks
  • 4 tbsp unsalted butter, cubed and at room temperature
  • 1/2 cup whole milk, warmed
  • 1/2 cup sharp cheddar cheese, grated (about 2 oz)
  • 1 large egg yolk
  • 1 tsp fine sea salt
  • 1/4 tsp freshly ground black pepper
  • For the Lamb Filling:
  • 2 tbsp olive oil
  • 1 large yellow onion, finely diced (about 1.5 cups)
  • 2 medium carrots, peeled and finely diced (about 1 cup)
  • 2 celery stalks, finely diced (about 3/4 cup)
  • 3 cloves garlic, minced
  • 1/4 cup all-purpose flour
  • 1 cup dry red wine (such as Cabernet Sauvignon)
  • 2 cups beef stock, preferably homemade or low-sodium
  • 1 tbsp Worcestershire sauce
  • 2 tsp fresh rosemary, finely chopped
  • 1 tsp fresh thyme leaves
  • 1 bay leaf
  • 1 lb cooked roast lamb, trimmed of excess fat and shredded or finely chopped
  • 1 cup frozen peas
  • 1 tsp fine sea salt
  • 1/2 tsp freshly ground black pepper

Instructions

  1. Place the peeled and chunked potatoes in a large pot and cover with cold water by 1 inch. Add 1 tablespoon of salt to the water. Bring to a boil over high heat, then reduce to a steady simmer. Cook for 15-18 minutes, or until the potatoes are completely tender when pierced with a fork. Drain thoroughly in a colander and let them steam-dry for 2 minutes to remove excess moisture, which prevents a watery mash.
  2. Return the drained potatoes to the warm pot. Add the room-temperature butter and warmed milk. Mash with a potato ricer, food mill, or hand masher until completely smooth and no lumps remain. Stir in the grated cheddar cheese, egg yolk, 1 teaspoon of salt, and 1/4 teaspoon pepper until fully incorporated. The egg yolk helps the topping brown beautifully and bind. Set the mashed potatoes aside while you prepare the filling.
  3. Preheat your oven to 400°F / 200°C. Position a rack in the center. This high heat will ensure the potato topping gets a golden, crisp finish while the filling bubbles hot throughout.
  4. Heat the olive oil in a large, deep skillet or Dutch oven over medium heat. Add the diced onion, carrot, and celery. Cook, stirring occasionally, for 8-10 minutes until the vegetables have softened and the onions are translucent. Do not let them brown; you’re building a flavor base, not seeking caramelization at this stage.
  5. Add the minced garlic to the softened vegetables and cook for 1 minute, stirring constantly, until fragrant. Sprinkle the 1/4 cup of flour over the vegetable mixture. Cook, stirring continuously, for 2 minutes to cook out the raw flour taste. This creates a roux that will thicken the filling.
  6. Pour in the red wine, scraping up any browned bits from the bottom of the pan with a wooden spoon. Let it simmer for 3-4 minutes, until reduced by about half and the alcohol smell has cooked off. This concentrates the wine’s flavor and removes harshness.
  7. Gradually whisk in the beef stock, Worcestershire sauce, rosemary, thyme, and add the bay leaf. Bring the mixture to a simmer over medium heat, then reduce to medium-low. Let it cook gently for 10-12 minutes, stirring occasionally, until the sauce has thickened to a gravy-like consistency that coats the back of a spoon.
  8. Stir in the shredded cooked lamb and frozen peas. Season with 1 teaspoon of salt and 1/2 teaspoon of black pepper. Simmer for another 5 minutes to heat the lamb and peas through and allow the flavors to meld. Taste and adjust seasoning if needed. Remove and discard the bay leaf.
  9. Transfer the hot lamb filling into a 9×9 inch or similar 2-quart baking dish, spreading it into an even layer. The filling should come about two-thirds of the way up the dish to leave room for the potato topping.
  10. Spoon the reserved mashed potatoes over the lamb filling. Using a spatula or the back of a spoon, spread the potatoes evenly to cover the filling completely, sealing it to the edges of the dish to prevent bubbling over.
  11. Create texture on the potato surface by dragging the tines of a fork across it in parallel lines or creating a cross-hatch pattern. This increases surface area, leading to more crispy, browned bits after baking.
  12. Place the baking dish on a rimmed baking sheet to catch any potential drips. Bake in the preheated 400°F / 200°C oven for 25-30 minutes, or until the filling is bubbling vigorously around the edges and the potato topping is golden brown with darker peaks.
  13. For an extra-deep golden top, switch the oven to broil for the final 2-3 minutes, watching closely to prevent burning. The top should be crisp and beautifully colored.
  14. Remove the shepherd’s pie from the oven and let it rest on a wire rack for 10-15 minutes before serving. This resting time allows the filling to set slightly, making it easier to cut clean portions and ensuring it’s not scalding hot.

Notes

Storage: Cool completely, then cover tightly and refrigerate for up to 3 days. Freezing: Assemble the pie in a freezer-safe dish, cover with a layer of plastic wrap pressed directly onto the potatoes, then foil. Freeze for up to 2 months. Thaw overnight in the refrigerator before baking. Reheating: Cover with foil and reheat in a 350°F / 175°C oven for 25-30 minutes until hot throughout (165°F / 74°C internal). For a crisp top, remove foil for the last 10 minutes. Individual portions can be microwaved on high for 2-3 minutes.

Nutrition

Keywords: hairy bikers leftover lamb shepherd's pie, leftover lamb recipe, British shepherd's pie, lamb cottage pie, comfort food, Sunday roast leftovers, savory lamb pie, mashed potato topping, family dinner, freezer meal, one-dish meal

Find it online: https://britishrecipes.uk/hairy-bikers-leftover-lamb-shepherds-pie/