Roasted Beet Salad with Goat Cheese, Walnuts & Honey-Dijon Vinaigrette

Preheat oven to 425°F and set an oven rack to the middle position. Wipe or scrub the beets clean, then trim stems down to one-inch (leave "tails" on). Place the beets on a large piece of aluminum foil, drizzle with 1 tablespoon olive oil, then wrap foil around the beets to form a neat packet. Roast