Korean Fried Chicken

Set a wire rack inside a rimmed baking sheet and place near stove. Set deep-fry thermometer in a heavy wide pot, then pour in oil to a depth of 1 1/2". Heat over high until thermometer registers 350ºF.

Meanwhile, toast sesame seeds in a small skillet over medium-low heat, stirring frequently, until lightly golden, 3–5 minutes. Transfer to a plate and let cool; set aside.

Heat sesame oil in same skillet over medium. Add ginger and scallion whites. Cook, stirring frequently, until scallions are tender, about 1 minute. Whisk in gochujang and brown sugar, bring just to a simmer, then remove from heat. Add 1/4 cup water; whisk to combine. Transfer sauce to a large bowl and cover to keep warm; set aside.