Preparation Whisk mayonnaise, sour cream, 3 tablespoons lime juice, lime peel, chile, and garlic in large bowl. Stir in cilantro. Add cabbage and green onions; toss to incorporate evenly. Season with salt and pepper. Cover and chill 1 hour. DO AHEAD: Can be made 1 day ahead. Keep chilled. Season slaw with more lime juice, salt, and pepper, if desired, just before serving.
Preparation Whisk mayonnaise, sour cream, 3 tablespoons lime juice, lime peel, chile, and garlic in large bowl. Stir in cilantro. Add cabbage and green onions; toss to incorporate evenly. Season with salt and pepper. Cover and chill 1 hour. DO AHEAD: Can be made 1 day ahead. Keep chilled. Season slaw with more lime juice, salt, and pepper, if desired, just before serving.