HEAT oven to 425ºF.
PLACE tomatoes on 2/3 of a foil-covered rimmed baking sheet; bake 10 min.
MEANWHILE, combine beans, parsley, garlic, pepper and 3 Tbsp. dressing.
ADD fish to baking sheet with tomatoes; brush with remaining dressing. Bake 10 min. or until fish flakes easily with fork.
ADD tomatoes to bean mixture; mix lightly. Serve with fish and rice.