How to Make It
In a blender, puree the cilantro with the sour cream, lime juice and olive oil until smooth. Season with salt and pepper.
In a large bowl, toss the red cabbage with the jalapeños, scallions and the cilantro dressing. Let stand for 15 minutes, until the cabbage just begins to wilt. Add the chicken and toss until it is coated with the dressing. Season with salt and pepper and serve with warm corn tortillas.