01 - Preheat the oven to 400°F.
02 - Wrap each beet individually in aluminum foil and place on a baking sheet. Roast for 35 to 40 minutes until tender when pierced with a knife.
03 - Allow beets to cool, then peel and cut into 1-inch wedges or slices.
04 - Whisk together olive oil, balsamic vinegar, honey, Dijon mustard, salt, and pepper in a small bowl.
05 - Arrange mixed greens on a serving platter and top with roasted beet slices, crumbled feta, and toasted walnuts.
06 - Drizzle the salad with the balsamic dressing and sprinkle with chopped parsley if desired.
07 - Serve immediately.