Take a kadai (wok) and heat mustard oil in it. Add onions and sauté until it turns slight brown. Add tomatoes, ginger and sauté for 2 to 3 minutes more.
Mix in all the dry spices and sauté for some more time. Add potatoes, eggs and water. Cook till the gravy thickens and potatoes are fully cooked.
Serve hot after garnishing with coriander leaves.
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