Mustard seeds are the small round seeds of various mustard plants. The seeds are usually about 1 or 2 mm in diameter. Mustard seeds may be colored yellow, brown or black. They are important herbs in many regional foods. Black or brown mustard seeds are widely used in Indian, especially Bengali and Southern Asian, cooking. When fried, the taste is nutty rather than fiery.
Poha (flattened rice), also called beaten rice or Chiwda is dehusked rice flattened into flat light dry flakes. Poha or rice flakes swell when added to liquid, whether hot or cold. Thicknesses of these flakes vary between almost translucently thin (the more expensive varieties) to nearly four times thicker than a normal rice grain.