Meanwhile, bring 1 1/4 cups water to boil in large nonstick skillet over medium heat. Add beets. Cover and cook until beets are tender, about 8 minutes. Uncover; cook until any water in skillet evaporates. Increase heat to medium-high. Add olive oil and garlic; sauté 30 seconds. Add all bell peppers, asparagus, and zucchini. Sprinkle with sea salt and black pepper. Sauté until just tender, about 8 minutes. Add cooked quinoa, green onions, and parsley to vegetables in skillet; toss to combine. Season with sea salt and pepper.