HEAT greased grill to medium heat.
BRING broth to boil in large saucepan on medium-high heat. Stir in rice; cover. Simmer on medium-low heat 10 min. Add zucchini, beans and corn; cook 5 to 7 min. or until rice is tender.
MEANWHILE, sprinkle chicken with salt and paprika. Grill 12 to 15 min. or until done (165ºF), turning after 8 min. Top evenly with 1/4 cup cheese; grill 1 min. or until melted. Slice chicken.
STIR remaining cheese into rice mixture; spoon into large shallow bowl. Top with chicken.