Dissolve the cornstarch in ½ cup cold water. In a small saucepan, bring two cups of water to a boil. Add the dissolved cornstarch and boil for two minutes. Add the sugar, stirring to dissolve. Boil three to four minutes. Add the salt and food coloring.
Allow filling to cool slightly, approximately one hour. Mix in the strawberries, then pour into the baked pie crust. Chill well.
With chilled bowl and beaters, whip the cream until stiff, while gradually incorporating the powdered sugar and vanilla.
Slice the pie into six pieces and top each serving with a dollop of whipped cream.