Creating Greek Beet Salad involves a few simple steps. Follow these instructions for a delicious outcome:

1. Prepare the Beets: Preheat your oven to 400°F (200°C). Wash the beets thoroughly and trim the ends. Wrap each beet in aluminum foil, place them on a baking sheet, and roast for about 30-40 minutes, or until tender. (You can also boil them for about 30 minutes if you prefer.)

2. Cool and Peel: Once cooked, allow the beets to cool for 10 minutes. Peel the skins off; they should come off easily.

3. Chop the Beets: Cut the beets into small cubes or slices, depending on your preference.

4. Prepare the Dressing: In a small bowl, whisk together olive oil, balsamic vinegar, lemon juice, salt, and pepper until well combined.

5. Combine Ingredients: In a large salad bowl, add the mixed greens, diced beets, sliced red onion, and walnuts.

6. Add Feta: Gently fold in the crumbled feta cheese to avoid breaking it up too much.

7. Dress the Salad: Pour the dressing over the salad and toss gently to ensure an even coating.

8. Garnish: Finish with a sprinkle of fresh parsley, if desired, for an added touch of flavor and color.

9. Serve: Enjoy immediately, or refrigerate for about 30 minutes to let the flavors meld together.