1
Adjust rack to top position (top and middle positions for 4 servings) and preheat oven to 425 degrees. Wash and dry produce.
Cut potatoes into ½-inch-thick wedges. Peel and mince or grate garlic. Zest and quarter lemon. Trim and halve zucchini lengthwise; thinly slice crosswise into half-moons. Halve, peel, and cut onion into ½-inch-thick wedges.