Shepherd's Pie with Sweet Potato Topping

1. 1

   Step 1

   • a.Prepare the Sweet Potato Topping
   • b.Place the cubed sweet potatoes in a large pot and cover with cold, salted water by at least one inch.
   • c.Bring to a boil over high heat, then reduce to a simmer. Cook for 15-20 minutes, or until the potatoes are very tender when pierced with a fork.
   • d.Drain the potatoes thoroughly in a colander. Return the empty pot to the stove over low heat and add the drained potatoes back in. Let them steam dry for 1-2 minutes, shaking the pot occasionally to prevent sticking. This step is key for a fluffy, non-watery mash.
   • e.Remove the pot from the heat. Mash the potatoes until smooth using a potato masher or ricer. Add the cubed butter, warm milk, nutmeg, 0.5 tsp salt, and 0.25 tsp black pepper. Stir vigorously until the butter is melted and the topping is creamy and well-combined. Set aside.
2. 2

   Step 2

   • a.Cook the Aromatic Base and Lamb
   • b.While the potatoes are boiling, heat the olive oil in a large, deep skillet or Dutch oven over medium-high heat.
   • c.Add the ground lamb. Cook for 5-7 minutes, breaking it apart with a wooden spoon, until it is browned all over. Use a slotted spoon to transfer the lamb to a separate bowl, leaving the rendered fat in the skillet. If there is more than 2 tablespoons of fat, drain the excess.
   • d.Add the chopped onion, diced carrots, and diced celery (the 'trinity' in Cajun cooking) to the same skillet. Sauté for 6-8 minutes, stirring occasionally, until the vegetables have softened and the onion is translucent.
   • e.Stir in the minced garlic and cook for another 60 seconds until fragrant, being careful not to burn it.
3. 3

   Step 3

   • a.Build the Savory Filling
   • b.Sprinkle the all-purpose flour over the cooked vegetables and stir continuously for 1 minute to cook out the raw flour taste. This will form a paste (a roux) that thickens the filling.
   • c.Stir in the tomato paste and cook for another minute until it darkens slightly in color, which deepens the flavor.
   • d.Gradually pour in the beef broth while stirring constantly to prevent lumps. Add the Worcestershire sauce.
   • e.Bring the mixture to a simmer. Let it cook for about 5 minutes, stirring occasionally, until the gravy has thickened enough to coat the back of a spoon.
   • f.Stir in the Cajun seasoning, dried thyme, the remaining 1 tsp of salt, and 0.5 tsp of black pepper. Taste and adjust seasoning if necessary.
   • g.Return the cooked lamb to the skillet. Add the frozen peas and stir everything together to combine. Remove from the heat.
4. 4

   Step 4

   • a.Assemble and Bake the Pie
   • b.Preheat your oven to 400°F (200°C).
   • c.Pour the lamb filling into a 9x13 inch baking dish (or a similar 2.5-3 quart casserole dish) and spread it into an even layer.
   • d.Carefully spoon the mashed sweet potato topping over the filling. Gently spread it out to cover the entire surface, sealing the edges to prevent the filling from bubbling over.
   • e.For a classic look, use the tines of a fork to create decorative ridges or swirls on the surface of the sweet potato topping. These ridges will brown nicely in the oven.
   • f.Place the baking dish on a foil-lined baking sheet to catch any potential drips. Bake for 20-25 minutes, or until the filling is hot and bubbly and the sweet potato topping is lightly golden brown on the peaks.
5. 5

   Step 5

   • a.Rest and Serve
   • b.Carefully remove the Shepherd's Pie from the oven. Let it rest on a wire rack for at least 10-15 minutes before serving. This crucial step allows the filling to set, making it much easier to slice and serve cleanly.
   • c.Garnish with fresh parsley or chives if desired, and serve warm.

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