01 - Preheat the oven to 400°F.
02 - Wrap each beet individually in aluminum foil, place on a baking sheet, and roast for 35–40 minutes or until tender when pierced with a fork. Remove from oven, unwrap, and allow to cool.
03 - Peel the cooled beets and cut them into wedges or cubes as preferred.
04 - In a dry skillet over medium heat, toast the walnut halves for 3–4 minutes, stirring frequently until they become fragrant. Remove from heat and let cool.
05 - Whisk together extra virgin olive oil, balsamic vinegar, Dijon mustard, honey, salt, and pepper in a small bowl until emulsified.
06 - Toss fresh arugula with half of the dressing in a large bowl to lightly coat the leaves.
07 - Arrange dressed arugula on a serving platter or individual plates. Top with roasted beets, red onion slices, toasted walnuts, and goat cheese if desired. Drizzle with remaining dressing.
08 - Serve immediately to enjoy the salad at its freshest.