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Adjust racks to middle and top positions and preheat oven to 425 degrees. Wash and dry all produce.
Dice sweet potato into ½-inch pieces. Trim and halve mushrooms. Halve, peel, and cut onion into ½-inch-thick wedges. Trim and halve zucchini lengthwise; cut crosswise into ½-inch thick half-moons. Peel and grate ginger. Zest and quarter lime.