In a large bowl, combine the broth, soy sauce, garlic, cornstarch, ginger and cayenne pepper. Add chicken; stir to coat. Heat oil in a large skillet over medium-high heat. Add chicken mixture. Bring to a boil; cook and stir 2 minutes or until thickened. Reduce heat to medium. Add peppers and water; cook and stir for 5-8 minutes or until peppers are tender.