Hyderabadi Mutton Spinach Curry

Ingredients:

2 1/2 lb Mutton
4 Onions
3-4 green chillies
3 small bunches of Spinach
1 cinnamon stick
3 cloves
2 cardamoms
2 tsp chili powder
1 tsp turmeric
Few coriander leaves, chopped
2 tbsp ginger-garlic paste
2-3 tbsp Oil
1/2 cup yogurt
Salt to taste

Preparation:

Heat oil in a pan and add cinnamon, cloves, cardamoms. When they
splutter add the onions and green chillies and fry till they become brown [...]