01 - Preheat the oven to 400°F.
02 - Wrap each beet individually in aluminum foil and place on a baking sheet. Roast for 35–40 minutes, or until tender when pierced with a knife.
03 - Allow the beets to cool, peel them, and cut into 1-inch wedges or slices.
04 - In a small bowl, whisk together olive oil, balsamic vinegar, honey, Dijon mustard, salt, and pepper until combined.
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 using. Serve immediately.