- 1/2 cup mayonnaise
 - 1/2 cup sour cream
 - 3 tablespoons (or more) fresh lime juice
 - 1 1/2 teaspoons finely grated lime peel
 - 1 serrano chile, seeded, minced
 - 2 garlic cloves, pressed
 - 1/3 cup chopped fresh cilantro
 - 8 cups thinly sliced green cabbage
 - 4 green onions, minced (about 1/4 cup)
 
- 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.