01 -
Dry roast white sesame seeds in a pan over low heat, stirring continuously until deeply golden and fragrant.
02 -
Transfer toasted sesame seeds to a suribachi or mortar and pestle; grind finely to a coarse powder.
03 -
In a small bowl, mix ground sesame seeds, soy sauce, tomato sauce, Worcestershire sauce, sugar, and hot mustard if desired until fully incorporated.