In a heavy bottom pan add ghee (clarified butter) and heat. Temper with cumin seeds, add garlic, green chillies, ginger and saute. Add chopped onion and caramelise it.
1 tbsp clarified butter, 1 tbsp chopped garlic, 2 chopped green chillies, 1/2 inch julianneginger, 1 tsp cumin seeds, 2 medium chopped onions