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• 1/2 cup butter
• 20 green chillies
• 6 medium-sized onions
• 8–10 cm piece ginger
• 2 whole garlic bulbs
• 1 3/4 lb chopped tomatoes
• 1.5 teaspoon salt
• 0.5 teaspoon turmeric
• 1 teaspoon cumin seeds
• 4 1/3 lb chicken wings
• 2 cups water
• 1.5 teaspoon garam masala
• large bunch coriander