Heat mustard oil in a kadahi and deep fry the potatoes on slow fire till light brown in colour. Potatoes will become light in weight. Remove on a tissue paper and keep aside.
Make a paste of JBL Aloo Dum Masala and keep aside.
In the same kadahi add Ginger Garlic paste and JBL Aloo Dum Masala paste and sauté for a few minutes till oil comes out.
Add salt, followed by beaten curd and tomato puree.
Cook for a minute and add fried potatoes. Stir cook and add water as required. Bring it to a boil and simmer for 10 minutes.
Add cashewnut paste and cook for two minutes. Check seasoning and consistency.
Remove in a bowl. Garnish with ginger julienne and sprig of coriander leaf.