Wasabi
Wasabi is Japanese horseradish. It's a green paste used on a variety of foods including seafoods and noodles. Sashimi (raw fish) is dipped into a mix of soy sauce and wasabi.
Wasabi is not an easy plant to grow and powdered wasabi actually can be a mix of western horse radish powder, mustard powder and food coloring. There can also be mixtures of wasabi and western horse radish.
Naturally, it's quite hot and a little goes a long way. Do not try to put wasabi on something the way you would squeeze out mustard; otherwise, the food you put it on could become almost inedible unless you like really, really spicy food.
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