Cut onion in small slices and brown it.
Marinate Mutton: In a bowl, add mutton.
Now crushed the brown onion and add in mutton.
Also, add yoghurt and mix well.
Marinate for 45 minutes.
Make Hyderabadi Mutton Masala: In a pan, toast on low heat cumin seeds, coriander seeds, fennel seeds and whole red chilli.
As it gets, aromatic add ginger, garlic and a small onion.
Make a paste of all ingredients.
Heat up the oil.
Add blended masala paste in the pan and saute on high heat.
As the oil comes on the surface, add marinated mutton in a pan and cook on high heat for a few minutes.
Add Garam Masala powder
Also, add salt and 150 ml water to make a gravy.
Cover for another 45 minutes on low-medium heat.
After 45 minutes check the mutton if there is some more water then cook on high heat to make a thick gravy.
Now the Hyderabadi mutton masala is ready to serve.