Preheat oven to 375°. Place potatoes, spinach and onion in a greased shallow roasting pan. Add oil, garlic, ¾ teaspoon salt, thyme and ½ teaspoon pepper; toss to combine.
Arrange chicken over vegetables; sprinkle with paprika and remaining salt and pepper. Roast on an upper oven rack 55-60 minutes or until a thermometer inserted in chicken reads 170°-175° and potatoes are tender.
