Heat 2 tablespoon mustard oil.Add onions and cook till transparent.now add tomatoes and cook at least 10 mins.
In a separate wok,heat remaining oil and add mustard seeds.saute till they crackle.
Stir in the onion-tomato mixture. Cook for 2 mins.
Add the chicken,salt,cumin powder and red chilli powder.
Cook for another 15 minutes on low flame.add tomato puree and cook till done.
Mix in all the spring onion green and cook 1 minute.
Remove from heat and serve hot with roti.
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Key Ingredients: chicken, mustard oil, onion, tomato, tomato puree, mustard seeds, salt, cumin seeds, red chilli, spring onion