4 karela
1 medium onion
2 tomatoes
1/3 cup oil
2 tablespoons tamarind
1 tablespoons chili powder
1 tbs coriander powder
1 tbs cumin powder
1/2 black mustard seeds
1/2 tsp ajwain
1 tbs mathi powder
2 tbs cilantro
2 tbs garlic ginger paste