Where does hot mustard, a common offering at Chinese restaurants, come from?
Mustard seeds, a pungent ingredient used throughout Asia for flavoring, are the base for the condiment: Powdered seeds are blended with spices and a liquid, usually oil, water or vinegar, to make the sauce. Its biting heat—reminiscent of wasabi or horseradish—is a common foil for fried foods or fatty cuts of meat, like pork belly.