For a vibrant and nutritious salad, make beet noodles using a spiralizer. Toss the beet noodles with arugula, crumbled feta cheese, toasted walnuts, and a simple vinaigrette made with olive oil, lemon juice, and Dijon mustard. The earthy flavor of the beets pairs perfectly with the tangy feta cheese and crunchy walnuts. This salad is not only visually appealing but also packed with antioxidants and essential nutrients.