One of my aunty at chennai used to prepare this kollu rasam, in fact she used to prepare or inculcate a lot of herbal spices in her daily routine cooking which I admire. That is why I couldn't resist myself buying horse gram when found in a super-market shelf (though it was an kilo pack!) I asked her for the recipe, and prepared it my way. The rasam came out super-delecious and I could still smell the flavours of it.
Kollu/Horse gram was generally regarded as an cattle feed, but here in South India kollu has found extensive culinery use. Kollu rasam, chutney, idly/dosa, poriyal are common form of its existence. This horse gram is proven beneficial in numerous ways. Since they form a major source of fibre, they can also aid in weight-reducing. They are also found as an preventive for winter chill , as they have tendency to heat up the body. Researchers have also found that unprocessed horse gram seed coats produce excellant antioxidants for diabetic patients. So, why wait guys? Do grab your pack in nearby markets.....