Rinse the chicken inside and out with cold water. Pat dry with paper towels.
Season the cavity of the chicken with salt and pepper and place lemon halves inside. Place the chicken on a rack in a roasting pan. Run your finger under the skin of the breast and thigh to loosen it and then place the sun dried tomatoes, garlic slices and rosemary between the meat and skin. Sprinkle the outside of the chicken with salt, pepper and 1/2 teaspoon of the sugar. Turn the chicken so that it is breast-side down on the rack and roast for 30 minutes. Turn the heat down to 350°F Turn the chicken so that it is breast-side up, sprinkle the breast with the remaining sugar and roast for another 30 to 40 minutes or until a thermometer inserted into the thickest part of the thigh registers 160°F Let the chicken rest for 15 minutes.