Cut squash in half lengthwise; remove and discard the seeds and membrane. Cut each half widthwise into 1/2-in. slices; discard ends. Place slices in a large skillet. Add 1 cup water; bring to a boil. Reduce heat; cover and simmer for 20 minutes or until tender.
Meanwhile, in a heavy saucepan, combine sugar and remaining water. Cook over medium heat until sugar melts and syrup is golden, stirring occasionally. Remove from the heat; carefully add the lemon juice, butter, salt and pepper. Cook and stir over low heat until butter melts. Place squash on a serving plate; top with syrup. Garnish with lemon and mint if desired. Yield: 6 servings.