1/2 cup finely chopped shallots
1 tablespoon white-wine vinegar
3/4 teaspoon kosher salt
1/4 cup fresh lemon juice
1/2 teaspoon sugar
1 1/2 teaspoons Asian sesame oil
1/2 cup vegetable oil
Stir together shallots, vinegar, and salt and let stand at least 5 minutes and up to 20 minutes. Whisk in lemon juice, sugar, and oils.