Did you know … Prepared mustard dates back thousands of years to the early Romans, who used to grind mustard seeds and mix them with wine into a paste not much different from the prepared mustards we know today. German lore advises a bride to sew mustard seeds into the hem of her wedding dress to assure her dominance of the household. In Denmark, and India, it's thought that spreading mustard seeds around the exterior of the home will keep out evil spirits.