Heat oven to 350.
Cut stems of beets. Usually when I buy beets they come in a bunch of two or three so I cooked all of them. Wash the beet and place individually in a tinfoil bowl you create around the beet. I put some olive oil on each one. Cook 30-50 minutes. Should be tender when you put a knife through it. Once cooked use a knife to take skin off and then slice into wedges.
Place Arugula, spinach, beet, clementine, orange, avocado and pistachios in bowl.
Mix the salad dressing together. Pour over the salad and mix well. Ready to serve.