Heat oil in large skillet on medium-high heat. Add ground chicken; cook and stir 3 minutes or until no longer pink. Stir in water, Gravy Mix, vinegar, garlic, ginger and sugar. Bring to boil. Reduce heat to low; simmer 10 minutes or until chicken is cooked through and most of liquid has evaporated, stirring occasionally.
Spoon chicken mixture into center of each lettuce leaf. Sprinkle with desired toppings. Fold sides of lettuce over filling and roll up to serve.