PREHEAT oven to 375°F. Cut zucchini lengthwise in half; scoop out centers onto cutting board, leaving 1/4-inch-thick shells. Place shells in 9-inch square baking dish; set aside.
CHOP zucchini pulp; place in medium bowl. Add 1/2 cup of the cheese, the tomatoes, cracker crumbs and basil; mix lightly. Spoon evenly into zucchini shells; sprinkle with remaining 1/4 cup cheese.
BAKE 15 min. or until heated through.