Soak double beans overnight. Pressure cook for 3 to 4 whistle till done.
Heat oil in a pan. Add in seasoning ingredients and let them sizzle.
Add in shallots, garlic, tomatoes and cook till mushy.
Add in salt, spice powders and toast for 2 mins.
Add in tamarind water, water, cooked double beans and mix well.
Add in jaggery and cook on low heat for 10 mins.
Serve with rice.