Grind together the ginger and garlic into a fine paste.
Heat oil in a kadai or pressure cooker. Add the onion and cook till golden brown.
Add the ginger garlic paste, green chili, and cook till the raw smell has disappeared from the ginger garlic.
Now add the tomato and mutton. Cook till all the water has dried up and the mutton pieces are slightly browned.
Add the garam masala powder, turmeric powder, cumin seeds, crushed red chili flakes. Stir and add 2 cups of water. Cook till the mutton is done and cooked thoroughly.
Garnish with corinader leaves and serve hot.