Rinse ½ cup rajma well first then soak in water overnight for for minimum 8 hours.
Next day rinse it well again and drain water.
Add to pressure cooker along with water till immersing level and salt.
Pressure cook for 5 whistles in low medium flame.
Once pressure releases open. It should be cooked soft but not mushy. Drain water and set aside.
For grinding - 3 tablespoon coconut, ½ teaspoon cumin seeds, 2 green chilies and a small piece ginger.
Grind it coarsely without adding water, it should be coarse and separated like this not like a paste.
To a pan heat 1 tablespoon coconut oil add ¾ teaspoon mustard seeds let it splutter. Then add ½ teaspoon urad dal, few curry leaves along with ¼ teaspoon hing.
Give a quick sauté.
Then add cooked rajma along with coconut mixture.
Give a quick mix and cook for few minutes until raw smell leaves. Switch off.
Rajma sundal is ready. Serve hot or warm!