1.Coconut oil can be replaced with sesame oil but coconut oil gives nice flavor to this curry.
2.Small onions can be replaced with 1 big onion, but small onions give the authentic taste.
3.Dry red chillies can be increased to spice up the curry.
4.Green chiilli can be skipped to bring down the spice level.
5.Traditionally, this curry is served thick. You shall increase water to thin down, if desired.
6.You shall skip grinding in mixie and mash using mathu/potato masher for traditional touch and elevated taste.
7. You shall use Kollu cooked water to make rasam and just serve this as thick thogayal without tempering. It can be mixed with rice or served as side-dish for rasam or curd rice.