Prepare the Beets: Begin by preheating your oven to 400°F (200°C). Clean and dry the beets thoroughly. Wrap each beet in aluminum foil, ensuring they are well-sealed. Place the wrapped beets on a baking sheet and roast them in the oven for approximately 45-60 minutes. They should be fork-tender when done.
Cool and Slice the Beets: After roasting, carefully remove the beets from the oven and allow them to cool for a few minutes. Once they are cool enough to handle, peel off the skin using your fingers or a paper towel. Slice the beets into thin rounds or half-moons, according to your preference.
Make the Dressing: In a large mixing bowl, combine the olive oil, balsamic vinegar, honey, salt, and freshly ground black pepper. Whisk the ingredients together until the dressing is well blended and creamy. Taste and adjust the seasoning as needed.
Prepare the Greens: In another mixing bowl, combine the arugula (or mixed greens) with the thinly sliced red onion. Drizzle a small amount of the prepared dressing over the greens and toss gently to ensure they are evenly coated.
Assemble the Salad: To bring the salad together, place the dressed greens on a serving platter. Artfully arrange the beet slices over the top. Next, sprinkle the crumbled feta cheese and the coarsely chopped walnuts evenly over the salad.
Final Touch: If desired, drizzle a little more dressing over the assembled salad for extra flavor. Finish with a light sprinkle of freshly ground black pepper to enhance the taste.
Notes
For a rustic presentation, serve on a large wooden platter or in individual bowls.