In a bowl mix besan, yoghurt and water. Strain and add salt and turmeric powder.
Transfer the mixture to a pan over moderate flame and bring to a boil. Stir constantly and cover the pan with a lid.
Reduce the flame and cook for around 2 minutes.Heat ghee in another pan over moderate flame. Add asafoetida, bay leaf, mustard seeds, red chillies and salt.
Sauté for a few seconds and add the red chilli paste (made by soaking red chillies in water and later blended in a blender).Simmer for a minute or two, and add this to the yoghurt mixture and stir well.
Cook for around 30 seconds and remove the pan from the flame.Serve hot with rice and vegetables of your choice.