Wash the horsegram well. Soak in water overnight.
Next day, drain the horsegram. Put into a pressure cooker with water an inch over its level. Add salt and turmeric powder.
Pressure cook on high for 6-8 whistles. Switch off and allow the pressure to go off completely.
Open the lid and drain the cooked horsegram of excess water.
In a saucepan, heat oil and splutter mustard seeds.
Add the remaining ingredients and saute for a couple of minutes till the garlic is fried.
Add the cooked horsegram and toss well to coat. Leave on low flame for five minutes.
Switch off and serve warm as side for rice and curry. Or have as it is like a snack!