HEAT oven to 375ºF.
SPRINKLE 1/4 cup bread crumbs onto bottom of 8-inch square baking dish sprayed with cooking spray. Mix remaining crumbs with Parmesan and butter.
MIX cream cheese spread, milk and basil until blended. Combine zucchini and squash; spread half over crumbs in prepared dish. Cover with layers of half each of the cream cheese mixture and mozzarella. Repeat all layers. Top with tomatoes and Parmesan mixture.
BAKE 20 to 25 min. or until vegetables are heated through and top is golden brown. Let stand 5 min. before serving.