MIX mayonnaise, sour cream, curry paste and lime juice in large bowl until well blended. Add chicken, celery and onion; toss to coat well. Cover.
REFRIGERATE at least 30 minutes or until ready to serve.
SPOON chicken salad into center of each lettuce leaf. Sprinkle with peanuts and basil, if desired. Fold sides of lettuce over filling and roll up to serve.
Thai Kitchen Tip: Thai basil has dark green leaves with purple stems and has a licorice flavor. It can be found in most Asian groceries. If unavailable, substitute Italian basil.
Nutrition Information Per Serving: 279 Calories, Fat 23g, Protein 15g, Carbohydrates 3g, Cholesterol 53mg, Sodium 257mg, Fiber 1g