Shepherd's Pie

Instructions

1. Cut the peeled potatoes into uniform 1/2-inch pieces — consistent size means even cooking. Drop them into a medium saucepan and cover completely with cold water. Bring to a rolling boil over high heat, then reduce to a steady simmer and cook uncovered until a fork slides through easily, 10 to 15 minutes.

   ⏱ 15 min
2. While the potatoes cook, combine the half-and-half and butter in a microwave-safe bowl. Warm for about 35 seconds — you want the butter melted and the mixture just heated through, not scalding hot.

   ⏱ 35 sec
3. Drain the potatoes thoroughly and return them to the hot pan — the residual heat helps evaporate any remaining moisture. Mash until completely smooth, then gradually work in the warm half-and-half mixture along with the salt and pepper. Once creamy, stir in the egg yolk until fully incorporated.
4. Set your oven to 400°F and position the rack in the center. This temperature will brown the potato topping beautifully without drying out the filling underneath.
5. Warm the canola oil in a 12-inch sauté pan over medium-high heat until shimmering. Add the chopped onion and diced carrots, stirring occasionally until they start developing golden edges, about 3 to 4 minutes. This caramelization builds the flavor foundation for your filling.

   ⏱ 4 min
6. Stir in the minced garlic and let it bloom for 30 seconds, then crumble in the ground lamb along with the salt and pepper. Break up the meat with a wooden spoon and cook until no pink remains and the lamb has developed a nice brown color, about 3 minutes total.

   ⏱ 3 min
7. Sprinkle the flour evenly over the meat mixture and toss everything together until the flour disappears. Cook for 1 full minute — this step cooks out the raw flour taste and helps thicken your gravy later.

   ⏱ 1 min
8. Stir in the tomato paste first, letting it coat everything, then pour in the chicken broth, Worcestershire sauce, rosemary, and thyme. Bring the mixture to a bubbling boil, then reduce the heat to low, cover, and let it simmer gently for 10 to 12 minutes until the sauce has thickened to a rich, gravy-like consistency.

   ⏱ 12 min
9. Fold the corn and peas into the lamb mixture — they'll finish cooking in the oven, so don't worry about cooking them through now. Transfer everything to an 11x7-inch glass baking dish, spreading it into an even layer that reaches the corners.
10. Spoon the mashed potatoes over the filling, starting at the edges and working toward the center — this creates a seal that prevents the filling from bubbling up. Use a rubber spatula to smooth the surface, creating gentle peaks and valleys that will brown beautifully.
11. Set the baking dish on a parchment-lined sheet pan to catch any potential spills, then slide it onto the middle oven rack. Bake for 25 minutes until the potato peaks turn golden brown and the filling bubbles gently around the edges.

    ⏱ 25 min
12. Let the shepherd's pie rest on a cooling rack for at least 15 minutes before serving — this resting time allows the filling to set up so your portions hold together beautifully when you scoop them out.

    ⏱ 15 min