Whisk 3 tablespoons oil, 2½ tablespoons lemon juice, garlic, 1 teaspoon Italian seasoning, ½ teaspoon salt and ¼ teaspoon pepper together in a large bowl.
Add 2 cups beets, rinsed chickpeas, 1½ cups quinoa, 1 cup arugula (or romaine), diced celery and sliced scallions; toss to coat.
