Sparkling Lemon-Lime Sorbet
["1 envelope Knox gelatine", "1/2 c. sugar", "1 c. water", "1 c. champagne or ginger ale", "1/2 c. lemon juice", "1/3 c. lime juice"]
["In medium saucepan, mix gelatine with sugar.", "Blend in water. Let stand for 1 minute.", "Stir over low heat until gelatine is completely dissolved, about 5 minutes.", "Let cool to room temperature.", "Stir in remaining ingredients.", "Pour into 9-inch baking pan.", "Freeze for 3 hours or until firm.", "With electric mixer, beat mixture until smooth.", "Return to pan; freeze 2 hours or until firm.", "To serve, let stand at room temperature 15 minutes or until slightly softened.", "Garnish with fruit, if desired."]
["gelatine", "sugar", "water", "ginger ale", "lemon juice", "lime juice"]