Cut your Sweet Potato into wedges. Approx. 8 Wedges per potato. Toss the carrots and potatoes in oil, season with salt, pepper and rosemary. They carrots cook best in a cast iron pan with a lid (dutch oven) but a casserole dish with a lid will also work. Cook covered at 350 degrees for about 15-20 minutes until soft when punctured with a fork. Remove the lid and place under a broiler for 5 minutes to brown.