HEAT oven to 350ºF.
WHISK egg and dressing in large bowl until well blended; stir in zucchini. Mix remaining ingredients in separate bowl. Add to zucchini mixture; stir just until moistened.
POUR into 8x4-inch loaf pan sprayed with cooking spray.
BAKE 50 min. or until toothpick inserted in center comes out clean. Cool in pan 10 min.; remove from pan to wire rack. Cool completely.