Spicy Scallion and Onion Salad

Directions

1. 1.

   Place onion and scallions in a medium bowl of cold water. Chill until scallions curl, at least 20 minutes.

2. 2.

   Meanwhile, whisk gochugaru, sugar, 1 teaspoon salt, 1/2 teaspoon pepper, and 1 tablespoon water in a medium bowl. Let sit, whisking occasionally, until sugar is dissolved and sauce looks shiny, about 10 minutes.

3. 3.

   Drain onion and scallions and spin in a salad spinner or pat dry. Transfer to bowl with gochugaru sauce. Add vinegar and toss to coat; season with salt and pepper.

4. 4.

   Do ahead: Onion and scallions can be soaked 1 day ahead. Keep chilled.