With a hint of acidity and some back-of-mouth tingle, yellow mustard adds a pop of flavor to hot dogs, sauces, and more. But ...

but the most fundamental is that they're made from different types of seeds. Chinese hot mustard is made from naturally ...

In addition to the 500 varieties the museum sells, Levenson has a personal collection of 4,700 different types of mustard on display. “There’s a lot of bizarre stuff from all over the world ...