A collage of six mustard images: Seeds of the mustard plant (top left) may be ground (top right) to make different kinds of mustard. The four mustards pictured are a simple table mustard with turmeric coloring (center left), a Bavarian sweet mustard (center right), a Dijon mustard (lower left), and a rough French mustard made mainly from black mustard seeds (lower right).Image credit: Rainer Zenz