Ingredients
1 small sweet onion, coarsely chopped
5 tablespoons plus 1 teaspoon Japanese soy sauce
1/4 cup plus 2 teaspoons rice vinegar
4 teaspoons water
1 teaspoon sugar
1 pinch fine sea salt
1/2 teaspoon dry mustard
1 pinch freshly ground pepper
2 tablespoons plus 2 teaspoons grapeseed oil
2 tablespoons plus 2 teaspoons toasted sesame oil
Preparation
Pulse onion in a food processor until finely chopped. Transfer to a fine sieve set over a small bowl and let drain.
Place 3 tablespoons drained onion, soy sauce, vinegar, water, sugar, salt, mustard, and pepper in a bowl and whisk until sugar and salt are dissolved and mixture is combined. Whisk in oils until combined.
