01 - Preheat the oven to 400°F.
02 - Wrap each beetroot in foil and place on a baking tray. Roast for 35 to 40 minutes, until tender when pierced with a knife.
03 - Allow beetroots to cool slightly, then peel and cut into wedges.
04 - Toast walnut halves in a dry frying pan over medium heat for 2 to 3 minutes, stirring frequently until fragrant. Remove from heat and set aside.
05 - In a small bowl, whisk together olive oil, balsamic vinegar, Dijon mustard, honey, salt, and freshly ground black pepper.
06 - Arrange mixed greens on a large platter or individual plates. Top with beetroot wedges, crumbled goat cheese, and toasted walnuts.
07 - Drizzle the dressing over the salad just before serving.