Mustard seeds (Rai)
Mustard Seeds, commonly known as Rai, are the small round seeds of various mustard plants. The seeds are usually about 1 to 2 millimeters in diameter and may be colored from yellowish white to black. They are an important spice in many regional foods and may come from one of three different plants: black mustard (Brassica nigra), brown Indian mustard (B. juncea), or white mustard. Mustard Seeds are available in white, brown and black varieties and is used by people all over the world.
Greeks, Romans, Asians and Africans have all explored the taste of mustard seeds and have integrated them into their cuisines.