1In large bowl, combine water, lemonade concentrate, whiskey and sugar. Stir until sugar is dissolved. Cover and freeze until mixture becomes a slushy consistency, about 2 hours.
2To serve, pour frozen mixture into 2-quart pitcher. Add ginger ale; stir well. Garnish with lemon slices.
Yield: about 2 quarts.
Cals./serving: about 95
Preparation: 20 minutes; total time, 2 hours, 20 minutes