Black Mustard Seeds Has A Different Flavor Than Its Mediterranean Counterpart From Which It Originated. It Was One The Few Affordable Spices In Europe During The Middle Ages. In Indian Cuisine, Mustard Seeds Are Toasted In Oil Before They Are Added To The Dish. Powdered Mustard Acts As An Emulsifier In The Preparation Of Condiment, And Salad Dressings. Mustard Has A Strong Pungent Flavor, And Unlike Any Other Spice It Has Virtually No Aroma.