In a small saucepan, heat sugar and water until sugar is dissolved. Add berries. Bring to a boil. Reduce heat; simmer, uncovered, for 3 minutes. Combine cornstarch and cold water until smooth; gradually stir into the pan. Bring to a boil. Cook and stir for 2 minutes or until thickened. Remove from the heat; let stand for 10 minutes., Place bottom half of cheese in a small ungreased cast-iron or ovenproof skillet; pour 1/2 cup berry mixture over cheese. Top with remaining cheese and berry mixture. , Bake, uncovered, at 400° until cheese is softened, 8-10 minutes. Serve with chips.