While the sweet potatoes are cooking, let’s make the filling. Heat a 12-inch broiler-safe skillet over medium heat. When the pan is hot, add the ghee. Swirl it around. Then, toss the onions in the pan.
Cook, stirring, for 10 minutes or until the onions are translucent. (Got extra time? Cook for another 10 minutes, until the onions are browned, for even deeper flavor.)
Toss the garlic, ginger, and jalapeño peppers into the pan. Sauté for 30 seconds or until fragrant.
Crumble in the ground meat. Cook for 3 to 5 minutes or until the meat is mostly no longer pink, breaking up the pieces with your spatula.
Stir in the salt, turmeric, and coconut milk, and bring to a simmer. Cover the pan and reduce the heat to medium low. Cook for 20 minutes, stirring occasionally.
Stir in the peas and cook uncovered on medium heat for an additional 3 to 5 minutes or until the liquid in the skillet has mostly evaporated.
Remove the pan from the heat and mix in the garam masala, lemon juice, and minced cilantro.
Adjust the seasoning to taste with additional salt, garam masala, or lemon juice. Smooth the top of the meat in the pan.