Melt margarine in a large nonstick skillet over medium-high heat. Add chicken; stir-fry 3 minutes. Add broccoli and next 6 ingredients; cover, reduce heat, and simmer 5 minutes or until vegetables are crisp-tender, stirring often.
To serve, spoon 3/4 cup rice onto each plate; top evenly with chicken mixture. Sprinkle with sesame seeds.