Ulundhu Vadai or "The Indian Donut" is a lip- smacking delicacy belonging to South India.It is a disc shaped fritter made out of lentils,hence you can indulge in some guilty free snack.This hot crispy savory, is made ususally of urad dhal,leaving you to never stop having another bite.It is typically found on a south Indian breakfast menu, along with Idlis. They are a common snack/ complimentary dish in the south Indian households during occasions and when someone on an empty stomach takes a visit.