Preheat oven to 425degrees. Place rutabagas, potatoes and onion in a large bowl. Add 2 tablespoons oil, salt and pepper; toss to coat. Transfer to two greased 15x10x1-in. baking pans. Roast 35-40 minutes or until tender, stirring occasionally., Meanwhile, in a 6-qt. stockpot, heat 2 tablespoons oil over medium heat. Add ham; cook and stir 7-9 minutes or until browned. Remove ham with a slotted spoon; drain on paper towels., In same pot, heat remaining oil. Add red pepper and celery; cook and stir 4-6 minutes or until crisp-tender. Stir in flour, onion powder and paprika until blended; gradually stir in stock. Bring to a boil, stirring occasionally; cook and stir until slightly thickened, about 5 minutes., Stir in cream, roasted vegetables and ham; heat through. Season with salt and pepper to taste.