- Wash and soak the dry kidney beans in about 2-3 cups of water for about 6 hours. 
- Peel the thick skin of the watermelon and dice them. 
- Prepare the ginger, garlic and turmeric. 
- Drain the soaked kidney bean and wash them and set aside 
- Dice the tomato and set aside. 
- Soak the tamarind in warm water and  extract the pulp 
- Into the pressure cooker add the nigella seeds, cumin and fennel with 1 tsp of oil ( I have used olive oil) and saute for a minute till the seeds sizzle 
- Add the ginger, garlic and turmeric root ( if using, if not add the turmeric powder in the next step) and saute for a few seconds 
- Add the soaked kidney bean, melon, tomato, tamarind, salt, bisibelebath masala and mix well. 
- Add 2 cups of water and pressure cook for about 5 whistles 
- Allow pressure to release naturally and then open the lid 
- Gently mash in a bit of the beans to give a thicker consistency to the curry. 
- Stir in the chopped herbs and the curry is ready to serve after a taste test, 
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