Cut them into 1-inch pieces, boil them with 1/4tsp of salt till they become soft
Drain the water & keep aside
Dry fry til, coconut powder with jeera
Grind them with channa dal into course powder
Lastly add garlic cloves, run mixie for a second and remove the powder & keep aside
Heat oil, add mustard seeds, red chilli pieces, urad dal & curry leaves
Fry till the seeds splutter and urad dal turns light brown
Add onion pieces, fry till they become soft
Add red chilli powder, salt and haldi, stir once
Add beans, mix well and cover the kadai for 2 min
Stir the curry once after a min
Remove the lid, sprinkle the masala powder & chopped coriander over the curry
Mix thoroughly and remove,
Serve with plain rice and sambhar
You can add 2 tbsp of tomato puree after the onion becomes soft and cook for 2 min.
Then proceed as per the method (some water may be added if necessary to make gravy).(Omit channa dal and make fine paste with the remaining masala ingredients).
Serve with chappathi/puri.