Strawberry-Citrus Slush

1 can (46oz) pink grapefruit juice (about 6 cups)
1 can (12 oz) frozen (thawed) lemonade concentrate
1/2 c. sugar
1 package (.14 oz) strawberry-flavored drink mix
1 (2 liter) bottle ginger ale, chilled

In a 2 quart nonmetal freezer container, stir all ingredients except ginger ale until sugar is dissolved. Freeze 4 to 6 hours or until slush consistency.

If slush is frozen solid, let stand at room temperature for about 30 minutes before serving. To serve, spoon 1/2 c. slush mixture into each class. Pour 1/2 c. ginger ale over each.