Preheat oven to 400 degrees.Bake pie shell according to directions for empty baked crust.Cool.Chop one cup of strawberries.Combine sugar and cornstarch in a 2 qt. saucepan.Stir in water gradually until smooth.add chopped strawberries.Cook,stirring constantly,until mixture thickens and boils.Remove from heat.Stir in food coloring.Cool in refrigerator 1/2 hour.Pour 3/4 of the syrup into prepared pie crust. Stand up remaining strawberries in pie crust,reserving 1/4 cup (about 3 large strawberries) for garnish.Pour remaining syrup over strawberries Chill until firm,about 3 hours.To serve,top each slice with Whipped Topping and a slice of reserved strawberry.