Hygienically Processed Mustard Seed is small round usually about 1 or 2 mm in diameter. The Mustard Seed is hygienically processed in order to maintain its good quality. The Mustard Seed can be mixed with water, salt, lemon juice, or other liquids, and sometimes other flavourings and spices, to create a paste or sauce ranging in colour from bright yellow to dark brown. Hygienically Processed Mustard Seed is also used as an ingredient in many dressings, glazes, sauces, soups, and marinades.