FOR THE BEETS:
Preheat oven to 425°F. Wipe or scrub beets clean then trim stems down to one-inch (leave “tails” on). Place beets on a large piece of foil; drizzle with olive oil, then wrap foil around them to form a neat packet. Roast directly on rack in middle of oven until tender, about I hour. Test for doneness by piercing the largest beet with a knife. If it enters easily, it’s done. Unwrap the beets and let sit until cool enough to handle. Use your hands or a paring knife to peel the skin, then cut into wedges.
FOR THE VINAIGRETTE:
In a small bowl, whisk together the honey, Dijon mustard, red wine vinegar, shallots, salt and pepper. Whisking constantly, slowly add the oil in a steady stream. (Alternatively, add all the ingredients to a jar, cover with the lid, and shake vigorously to blend.) Taste and adjust seasoning if necessary.
FOR THE SALAD:
Place the greens in a large bowl, drizzle with about half of the vinaigrette and toss to combine. Add as much of the remaining vinaigrette as desired and toss again. Arrange the greens on a large platter or divide onto plates, then top with beets, walnuts and goat cheese. Serve immediately.