Heat the mustard oil in a Kadai until it starts to smoke. Once it does, turn off the flame and let it cool down a bit.
When the oil is just hot enough (but not too hot), toss in the bay leaf, cinnamon, cardamom, and cloves. Sauté them until they release their aroma.
Add the mutton cubes to the pan and sauté until they're browned on all sides.
Sprinkle in the red chilli powder. Quickly add water right after to prevent the chilli from burning.
Combine the curd with an equal amount of water, then pour this mixture into the pan.
Now, add salt, black cardamom powder, roasted cumin powder, dry ginger powder, and fennel powder. Give it a good stir.
Pour in the remaining water. Transfer everything to a pressure cooker. Cook on high heat until you hear one whistle, then lower the flame and let it simmer for about 15 minutes or until the mutton is tender.
Let the pressure release naturally.
Once it's safe, open the lid and sprinkle in the crushed kasoori methi.
Serve your delicious Mutton Rogan Josh hot with steamed rice.