I love Aviyal period. From a very young age if there is one vegetarian recipe that I love it is Aviyal, I am not sure why I love it but I did. Never knew how mum makes it but still I loved it. Its a Kerala recipe, a combination of loads of vegetables, coconut, seasoning and tempered with coconut oil. Some use curd others don't so its really a personal choice. I love it both ways. If you are opting for a vegan option skip curd.