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