Preheat oven to 375º. Place chicken on a rack in a 9x13-inch roasting pan. Quarter the apple and onion and place chunks in chicken cavity.
Stir oil, paprika, cumin, salt, pepper, and garlic granules in a small bowl to form a paste. Rub paste all over chicken. Roast chicken for 60–90 minutes, or until juices run clear when thigh is pierced with a knife. Transfer to a serving platter and let rest for 15 minutes before carving. Garnish with rosemary sprigs.