A red chile mixed into this crunchy salad provides the perfect amount of heat (in flavor, not temperature).
Combine lemon juice and chile slices in a bowl. Pour in oil in a slow, steady stream, whisking constantly until emulsified. Season with salt and pepper.
Toss together cabbage, scallions, and cilantro in a large bowl. Just before serving, drizzle with dressing, and season with salt and pepper; toss.