Ingredients 

• 2 med size potatoes boiled, peeled & cubed
• Lemon size tamarind ball (Soak in warm water for 10-15 min & take juice)
• 2 med size onions chopped finely
• 3-4 tsp chilli powder
• 1 tsp mustard
• Few curry leaves
• 2 tbsp oil
• Coriander leaves to garnish

• Heat oil in a pan & season with mustard & curry leaves. 
• When mustard starts to splutter, add chopped onions & fry till golden brown. 
• When it's done add chilli powder, fry till the aroma of chilli powder comes. 
• Now add juice of tamarind & little water. 
• When this mix starts to boil, add cubed potatoes & salt. 
• Let the gravy boils nicely, take it from stove & sprinkle some coriander leaves.