Cut beets in half, place in a shallow baking dish and drizzle with olive oil tossing until coated. Cover with foil and bake at 425°F for 40 minutes or until tender. Once cool, peel and slice into 1/4-inch thick slices. Set aside (may want to wear some rubber gloves to avoid staining your hands red!).
To toast nuts, place in a small dry fry pan and heat over medium heat, shaking pan occassionally, until nuts just start to turn brown and become fragrant (or you can put them in the oven while cooking beets, just check on them every 5 minutes).
To serve the salad, add greens to 4 salad plates, top with sliced beets, crumbled goat cheese, and some nuts.
For vinaigrette, combine all ingredients together in a screw-top jar and shake well. Then drizzle some over each salad and toss well.
Notes
Beets come in a variety of colors - red, yellow, and candy-stripped. For a beautiful looking salad, try a blend of all colors.