Quarter the white parts of 4 scallions lengthwise; thinly slice the green parts. Soak the scallion whites in cold water, 15 minutes; drain. Whisk 2 tablespoons rice vinegar, 1 minced garlic clove, 1 teaspoon each sesame oil, chili oil and kosher salt, and 1/2 teaspoon sugar. Toss with the scallions (white and green parts), 2 bunches cilantro (leaves and tender stems), 1 thinly sliced serrano chile and 1 english cucumber (cut into thin strips).
Photograph by Con Poulos
Recipe courtesy Food Network Magazine