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Adjust rack to top position (top and middle positions for 4 servings) and preheat oven to 425 degrees. Wash and dry produce.
Roughly chop parsley leaves and stems. Halve, peel, and mince shallot until you have 1 TBSP (2 TBSP for 4). Quarter lemon. Trim and peel carrot. Using a peeler, shave carrot lengthwise into ribbons, rotating as you go, until you get to the core. Discard core. Halve grapes lengthwise.