To make Kollu Thogayal, heat the oil in a pan first. Now add mustard seeds and let it cook for 10 seconds. After 10 seconds add asafetida, curry leaves, dry red chillies, chana dal and urad dal. Mix and let it cook for 15 seconds. After 15 seconds add turmeric powder and lentils. Cook for 2 to 3 minutes. Turn off the gas and add coconut to it. After cooling, add some water and make a paste. Add salt and grind once again. Serve. Serve Kollu Thogayal with mixed vegetable sambar, rice and Chow Chow Thoran for dinner.