Heat oil in a pressure cooker and fry the onions till nicely wilted.
Add the garlic, sprinkle a little water and cook till a nice aroma comes.
Add the tomatoes, powders and salt and cook till oil start to separate.
Add the meat and mix well to coat in the masala. Cook for five minutes, add around 1/2 cup of water.
Close the lid and cook for a whistle. Switch off and allow the pressure to go by itself.
Whisk the yogurt, fennel powder and pepper together and combine into mutton. Cook on simmer for 10 minutes.
Adjust seasoning and serve hot with rice or rotis.