Shepherd's Pie with Sweet Potato

Shepherd's pie is the definition of comfort: a deep, savory lamb filling under a cloud of mash, baked until bubbling. This version swaps the usual potato for sweet potato, whose gentle sweetness and burnished orange crust play beautifully against the rich, herby lamb beneath. Piped into peaks and broiled golden, it is humble food made handsome — a one-dish supper that feels like a hug.

The Savory Lamb Filling

The soul of the pie is a well-built filling. Brown the ground lamb with its vegetables until deeply colored, then simmer it with aromatics and herbs into a thick, savory base, stirring in the peas near the end so they stay bright. You want the mixture rich but not loose — thick enough to hold its shape under the topping — so let it reduce until glossy. This is where the flavor lives, so season it boldly and taste as you go.

The Sweet Potato Crown

The topping is what makes this version sing. Cook and mash the sweet potatoes smooth and season them well, then pipe or spread them over the filling in generous peaks and ridges — those raised edges are what catch the heat and crisp to golden under the broiler. A final pass under high heat turns the surface burnished and just-crisp while the filling bubbles beneath. The contrast of that caramelized sweet crust against the savory lamb is the whole joy of the dish.

Jorj Morgan

Shepherd's Pie with Sweet Potato

This luxurious take on Shepherd's Pie elevates a classic comfort with a fragrant lamb filling, richly spiced with cumin, thyme, and a hint of cinnamon. Crowned with a fluffy, golden-edged sweet potato topping, it's a deeply satisfying and elegant offering perfect for a cozy supper.

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Prep Time 30 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 15 minutes mins

Servings: 8 people

Course: Main Course

Ingredients Equipment Method

Ingredients

  

Sweet Potato Topping

• 4 medium sweet potatoes
• 1/4 cup half and half
• 2 tablespoons butter
• 1 large egg
• 1 teaspoon kosher salt
• 1 teaspoon coarse black pepper

Lamb & Vegetable Base

• 2 pounds ground lamb
• 2 tablespoons olive oil
• 1 large white onion peeled and diced, about 1 1/2 cups
• 2 medium carrots peeled, trimmed and diced, about 1 cup
• 2 medium garlic cloves peeled and minced, about 1 teaspoon
• 2 tablespoons unbleached all-purpose flour
• 1 6-ounce can tomato paste
• 2 cups homemade beef broth or prepared low sodium chicken broth

Braising Aromatics, Spices & Peas

• 1 teaspoon Worcestershire sauce
• 1 teaspoon ground cumin
• 1 teaspoon dried thyme
• 1 teaspoon dried rosemary
• 1 whole cinnamon stick
• 1 10-ounce package frozen peas, thawed
• 1 10-ounce package frozen pearl onions, thawed

Equipment

• Piping Bag

Method

 

Sweet Potato Topping

1. Preheat the oven to 350 degrees.
2. Pierce the potatoes with a fork.
3. Roast until the potatoes are squishy soft, about 30 minutes.
4. Cut each in half and peel off the skin.
5. Set the peeled potatoes into the bowl of a food processor.
6. Pour the half and half into the bowl.
7. Add the butter and egg.
8. Season with salt and pepper.
9. Pulse until the sweet potatoes are pale orange and fluffy.
10. Let them cool while you make the filling.

Brown the Lamb & Veggies

1. Crumble the lamb into a non-stick skillet or cast iron skillet over medium high heat.
2. Use a wooden spoon to stir the meat, breaking up any large clumps.
3. Cook until all of the lamb is browned and fragrant, about 8 to 10 minutes.
4. Use a slotted spoon to transfer the lamb to a bowl.
5. Pour the juices from the pan into a heatproof container and discard when cool enough to handle.
6. Drizzle the olive oil around the bottom of the skillet.
7. Cook the onion, carrots and garlic in the skillet until soft, about 5 minutes.
8. Transfer the lamb and any juices from the bowl back into the skillet.

Simmer the Savory Filling

1. Dust the lamb and veggies with flour.
2. Spoon the tomato paste into the lamb.
3. Pour in the beef broth and Worcestershire sauce.
4. Stir the cumin, thyme and rosemary into the filling.
5. Season with salt and pepper.
6. Bury the cinnamon stick in the meat.
7. Simmer until the sauce thickens, about 10 to 15 minutes.
8. Stir in the peas and onions and continue to simmer until the peas are soft, about 5 minutes more.
9. Remove the cinnamon stick and spoon the filling into an 11 x 7 x 2 inch baking dish.

Pipe Potatoes & Broil

1. Spoon the cooled sweet potatoes from the bowl of the processor into a resealable plastic bag.
2. Squeeze the bag to remove all of the air.
3. Cut the corner off the bag and press out the potatoes into decorative dollops over the top of the filling.
4. Set the oven to the broil setting.
5. Place the casserole directly under the broiler and heat until the potatoes just begin to turn golden brown on the edges, about 5 to 8 minutes.