PREHEAT oven to 400°F. Cut opened package of fish into four equal pieces; set aside. Heat dressing in large ovenproof skillet on medium-high heat. Add fish; cook 5 min. or until lightly browned on both sides, turning after 2-1/2 min.
COMBINE zucchini, tomatoes, olives and artichokes. Spoon evenly around fish.
BAKE 15 min.; sprinkle with cheese. Bake an additional 8 to 12 min. or until fish flakes easily with fork. Serve with lemon wedges.
