Roasted-Vegetable Salad with Garlic Dressing

Preheat oven to 400 degrees. Put squash, potatoes, carrots, brussels sprouts, celery root, and beets into a large bowl. Drizzle with 3 tablespoons oil, and sprinkle with 1 teaspoon salt and 1/4 teaspoon pepper; toss. Arrange vegetables in a single layer on 2 rimmed baking sheets (do not crowd). Roast 15 minutes.

Toss leeks with remaining tablespoon oil. Add to roasting vegetables; continue to roast, tossing halfway through, until golden brown and tender, about 35 minutes more. Transfer sheets to wire racks; let cool slightly.

Place greens on a platter; top with vegetables. Drizzle with warm dressing. Season with salt and pepper.