Soak white peas overnight or for 6-8 hours.
Pressure cook soaked white peas with 1 tsp of turmeric and salt for 3-4 whistles. Note: sometimes it takes more whistles so if not done check and whistle more.
Heat oil in large pan. Once the oil is hot add mustard seeds and let it splutter. Add curry leaves, hing and ginger-green chilli paste.
Add onions and tomatoes and saute for 2-3 minutes.
Once onions and tomatoes soften add all the dry spices.
Add boiled white peas to it with boiling water. Adjusting the consistency by adding more water and let it boil for 10 mins.