Grapefruit Pie - cooking recipe

Ingredients

2 grapefruits (pink or ruby red)
water
3 Tbsp. cornstarch
pinch of salt
1 c. sugar
red food coloring
1 pie shell, baked

Preparation

Cut grapefruits in half.
Put sections with membrane removed into a drainer set over a measuring cup.
Add water to make 1 1/2 cups of liquid.
Add all ingredients (except pie shell) together and cook until thickened.
Cool.
Add grapefruit sections.
Pour into baked pie shell.
Chill.
Serve with whipped topping.