Begin by removing the butter beans from their shells. Once peeled, the beans can even be stored in the freezer for months.
Pressure cook the beans with sufficient water for 2 whistles.
Meanwhile chop the onions, garlic, tomato, brinjal, drumsticks and soak the tamarind in water.
By now, the Butter beans should be cooked. If they are still firm, continue cooking until tender.
In oil splutter mustard, fenugreek and curry leaves.
Add Onions, garlic and saute for 3-4 minutes.
Further add drumsticks and brinjal.
After 2-3 mins add turmeric powder, kulambu milagai (all purpose chilli) powder and salt.
Mix it well so everything is evenly combined.
When they are slightly cooked add a chopped tomato
Add tamarind extract.
Pour enough water and mix well
Now transfer this to the cooked beans in the cooker.
Adjust water or salt according to your consistency.
Pressure cook for another 1 or 2 whistle.
Butter beans curry is ready to be served with hot rice.