In 12-inch nonstick skillet, heat oil over medium-high heat. Add chicken, gingerroot and garlic; cook and stir 3 to 4 minutes or until chicken is light golden brown. Stir in soy sauce mixture and peanut butter. Add broccoli and bell pepper; heat to boiling. Reduce heat; cover and cook over medium heat 4 to 5 minutes, stirring occasionally, until vegetables are crisp-tender.