The mustard sauce we eat is made by mixing the crushed yellow mustard seeds with some sort of liquid, such as water, vinegar, wine, or beer, along with salt and other spices. It is believed to have originated in Ancient Egypt. The Greeks used mustard as a medicine and a spice. Mustard is rich in protein, fiber, vitamin C and many of the B-complex vitamins. There are several health benefits of mustard for the body like relief from muscular pains, ringworm, and respiratory disorders, and also helps in treating cancer and diabetes. Yellow mustard has a crisp, tart-and-tangy flavor that won't be clearing anyone's sinuses with spice. And it is a must have in any bengali cooking.