Toor dal or arhar dal is a split pigeon pea with a subtle nutty flavor. It is one of the yellow dal. Toor dal is an ancient crop, believed to be cultivated for food since last 3000 years. Toor dal looks similar to chana dal and can be substituted with or for chana dal.
In the Indian grocery store, you can get toor dal with an oil coating to increase its shelf life or one without oil coating. Toor dal is also used to make a popular Andhra dish Kandi Podi, which is ground toor dal with chana dal or moong dal along with spices such as dried red chili, hing, cumin, curry leaves, salt.