Strawberry Punch II

1 16-ounce package frozen sliced strawberries, thawed
(or 2 cups fresh) (450-500 g frozen or 500 ml fresh)
1/2 cup sugar (125 ml)
6-ounce cans frozen lemonade, partially thawed (3-200 ml cans)
2 quarts ice water (2 liters)
1 quart (1 liter) ginger ale, chilled

Purée strawberries, add sugar and lemonade. Blend. Can be done hours before serving, but should stand 30 minutes. At serving time, add water and ginger ale. Pour over ice. Makes 4 quarts (4 liters).