1. Mix all of the vegetables together in a bowl. Sprinkle with the lemon juice and chill in the refrigerator for at least 20 minutes to let the flavors combine. Mix in the sour cream and aioli or mayonnaise. Salt and pepper just before serving. Use a slotted spoon to serve the slaw so some of the liquid drains away. Garnish with a cilantro sprig.
2. DIRECTIONS FOR AIOLI:
3. Place all ingredients except olive oil in a blender (or use an immersion blender). Cover and blend at medium speed until thoroughly combined. Remove the cover, and with the blender running, very slowly pour the olive oil in a stream into the mixture until it emulsifies and thickens. Chill and let the flavors combine for at least an hour.