Combine sugar, port wine, cherry jelly, cinnamon, salt and lime juice in a blazer pan or chafing dish. Heat and stir until smoothly blended. Add peach halves, cut side down, and prick rounded surfaces with a fork. Simmer 5 minutes, basting peach halves frequently with sauce. Add quarter cup heated brandy, set aflame and toss gently with silver fork and spoon until the flame dies. To serve, spoon peaches and sauce over individual servings of lemon ice cream.