Preparation Whisk first 4 ingredients in medium bowl to blend; reserve sauce. Bring broth to simmer in heavy large skillet over medium heat. Add chicken. Simmer until cooked through, breaking up meat with spoon, about 8 minutes. Add green onions and next 3 ingredients. Stir until vegetables are tender and most of liquid has evaporated, about 4 minutes. Remove from heat. Stir in sauce, cilantro and mint. Season with salt and pepper. Spoon into lettuce leaves; serve.
Preparation Whisk first 4 ingredients in medium bowl to blend; reserve sauce. Bring broth to simmer in heavy large skillet over medium heat. Add chicken. Simmer until cooked through, breaking up meat with spoon, about 8 minutes. Add green onions and next 3 ingredients. Stir until vegetables are tender and most of liquid has evaporated, about 4 minutes. Remove from heat. Stir in sauce, cilantro and mint. Season with salt and pepper. Spoon into lettuce leaves; serve.