Roast the Beets: Preheat your oven to 400°F (200°C). Wrap the beets in aluminum foil and place them on a baking sheet. Roast for about 50-60 minutes, or until they are fork-tender. Let cool, then peel and slice into wedges.
Prepare the Salad: In a large salad bowl, combine mixed greens, sliced roasted beets, and toasted walnuts.
Make the Dressing: In a small bowl, whisk together olive oil, balsamic vinegar, salt, and pepper.
Assemble the Salad: Drizzle the dressing over the salad, gently tossing to combine. Top with crumbled goat cheese before serving.
Serve and Enjoy: This salad is perfect as a side or a light main dish—enjoy it fresh!