Step 1

Rough up the scallion slices a little with your fingers so all the little layers of the scallion whites separate. Toss the coleslaw mix or both kinds of cabbage, the red onion and scallions together in a large bowl until everything is thoroughly mixed. You can make the slaw up to this point up to a day in advance as long as you keep it refrigerated. Before serving, simply bring the slaw back to room temperature, make the dressing and toss.

Step 2

Stir the remaining ingredients together in a small bowl until blended, then pour over the vegetables. Serve within 1 hour of dressing or the cabbage will get wilty and sad.