Robust, spicy and tender.
In a bowl, marinate the mutton pieces with turmeric powder, red chili powder, coriander powder, and salt. Let it sit for at least 30 minutes.
In a heavy-bottomed pan, heat oil over medium heat. Add the sliced onions and sauté until they turn golden brown.
Add the ginger-garlic paste and slit green chilies to the pan. Sauté for a minute, then add the marinated mutton. Mix well.
Cover the pan and cook on low heat for about 15-20 minutes until the mutton is tender. If using a pressure cooker, cook for about 2 whistles.
Once cooked, check for tenderness. If needed, cook uncovered for a few more minutes to dry out excess moisture. Add freshly ground black pepper and curry leaves. Stir well.
Serve hot with steamed rice or naan.