1Cut zucchini lengthwise in half; place zucchini and water in rectangular microwavable dish, 11x7x1 1/2 inches. Cover with plastic wrap, folding back one edge or corner 1/4 inch to vent steam.
2Microwave on High 3 to 5 minutes or until zucchini is crisp-tender. When cool enough to handle, scoop centers from zucchini, leaving 1/4-inch shells. Discard centers.
3Mix remaining ingredients. Spoon about 2 tablespoons corn mixture into each zucchini shell.