Take a flat pan, dry roast Horse gram (Kollu paruppu) for 5-10mins in medium heat on the stove.
Until you hear popping sound from the gram, continue to stir without a gap.
When the Horse gram turns to golden brown color, transfer it to a plate.
In the same pan heat some oil, add bengal gram dal, roast for two mins until
Dal turns to light brown color.
Add garlic pods and red chillies.
Now add the dry roasted Kollu(Horsegram) and fry in the oil with other ingredients.
Put coconut, some tamarind and required salt.
Switch off and let this mixture cool down for minutes.
Grind the ingredients into a coarse thogaiyal (chutney) by adding some water and set aside.