Combine strawberries, sugar and 1 cup of water; bring to a boil.
Cook until strawberries are tender.
Add gelatin, stirring to dissolve.
Add 1 cup cold water.
Chill until partially thickened.
Blend in frozen topping.
Pour into individual molds or 1 large mold; chill until firm.
Unmold; garnish with additional whipped topping and strawberries, if desired.