Step 1

Heat 2 Tbsp of the oil in a medium Dutch oven or saucepan with a heavy lid over medium heat. Add the garam masala, black pepper, Kashmiri chilli, turmeric, cardamon, and sauté until fragrant, 30 to 45 seconds. Add the onion and sauté until translucent and soft, 4 to 5 minutes. Stir in the garlic and ginger and cook for 1 minute. Fold in the lamb. Sauté the lamb until the meat starts to brown, 8 to 10 minutes. Add the water and ½ tsp salt. Bring to a boil over medium-high heat. Reduce to a simmer, cover, and cook until the lamb is tender about 1 hour. USDA recommends lamb reach an internal temp of 145F/63C with a 3-minute rest.

Step 2

While the lamb cooks, preheat the oven to 400F/200C. Spread the potatoes out onto a rimmed baking sheet. Toss the potatoes with 1 Tbsp oil and ½ tsp salt, spread in a single layer, and roast in the oven until the outside is golden brown and crisp while the insides are soft and easily pierced with a knife, 25 to 30 minutes. Remove from the oven.

Step 3

Once the lamb is cooked, stir in the coconut milk and lemon juice. Taste and season with salt. Add the potatoes and garnish with the cilantro. Serve hot or warm. Leftovers will stay good for up to 3 days if stored in an airtight container in the refrigerator.