PREPARATION:
- Combine chicken, ginger, garlic and red pepper flakes in medium bowl. Blend soy sauce into cornstarch in cup until smooth.
- Heat wok or large skillet over medium-high heat. Add oil; heat until hot. Add chicken mixture; stir-fry 2 to 3 minutes until chicken is cooked through.
- Stir soy sauce mixture and add to wok. Stir-fry 30 seconds or until sauce boils and thickens. Add water chestnuts, onions and peanuts; heat through.*
*Filling may be made ahead to this point; cover and refrigerate up to 4 hours. Just before rolling in lettuce, reheat chicken filling until warm. Proceed as directed in step 5.
- Divide filling evenly among lettuce leaves; roll up. Secure with toothpicks. Serve warm or at room temperature. Do not let filling stand at room temperature more than 2 hours. Serve with hot mustard.
