Mustard seeds are the small round seeds of various mustard plants.Mustard seeds are commonly used as a spice in various cuisines around the world. They are a key ingredient in mustard condiments, such as prepared mustard and Dijon mustard. Mustard seeds are also used in pickling, marinades, salad dressings, and spice blends like curry powder and pickling spice.Mustard seeds, which are more pungent and intense.Mustard seeds are often toasted or fried in oil to release their flavor before being added to dishes.Mustard seeds are rich in nutrients, including protein, fiber, vitamins, and minerals. They also contain compounds known as glucosinolates, which have antioxidant and anti-inflammatory properties. Consuming mustard seeds in moderation as part of a balanced diet may offer various health benefits.