Step 1

If you do not have coriander powder, add 2 tsps. Coriander seeds and then garam masala powder and red chili powder to a dry blender jar and powder together. That helps to make a fine powder.

Step 2

Heat oil in a pan, add cumin, mustard, and allow them to splutter. Add hing, ginger and then the curry leaves. Fry together till you smell the ginger good. Do not burn.

Step 3

Add onions, & green chilies. Fry till they turn golden.

Step 4

Next add tomatoes and sprinkle salt, turmeric. Saute for 2 mins

Step 5

On a low flame cover and cook till the tomatoes turn soft and mushy. The onion tomato mixture should blend well.

Step 6

While the tomatoes cook, you can peel and cube the sweet potatoes, add them to water till we use.

Step 7

Add chili powder, garam masala, coriander powder and red chili powder. Fry for about 1 to 2 minutes without burning.

Step 8

Next add sweet potato cubes, pour the same water we used to keep them. Just use enough water to immerse the sweet potatoes.

Step 9

Cook on a low flame, till they are soft cooked. You can adjust salt and spice at this stage.

Step 10

Keep covered for about 15 minutes for the flavors to absorb well by the sweet potato curry. Garnish with coriander leaves.