Bring sugar and 1/2 cup water to boiling point in unit over medium heat. Dissolve cornstarch in 3/4 cup cold water. Add to syrup mixture. Cook about 10 minutes over low heat, or until clear. Stir occasionally. Blend in salt, lemon juice and enough vegetable coloring to produce a red shade. Pour over strawberries; mix gently. When cool, place in baked pie shell. Garnish with whipped cream.