Gala Slush Punch
["4 medium grapefruit, peeled and cut into pieces", "1 (67.6 oz.) bottle lemon-lime carbonated beverage", "1/4 c. sugar", "1 pt. lime sherbet", "1 pt. pineapple sherbet"]
["In a blender or food processor, place half of the cut up grapefruit. Cover and process until nearly smooth; strain into a large bowl. Repeat with remaining grapefruit. Add half of the carbonated beverage (about 4 cups) to the grapefruit juice. Stir in the sugar until dissolved. Pour into a 9 x 9 x 2-inch pan. Cover and freeze 4 to 5 hours or until nearly firm, stirring 3 times during the freezing time."]
["lemon-lime", "sugar", "lime sherbet", "pineapple sherbet"]