Preheat over to 350 degrees Farenheit.
In a small bowl, beat egg yolks with fork.
In a 2-quart saucepan, mix sugar and cornstarch; gradually stir in water.
Cook over medium heat, stirring constantly, until mixuture thickens and boils.
Boil and stir 1 minute more.
Immediately stir at least half of hot mixture into egg yolks; shirt back into host mixture in saucepan.
Boil and stir 2 additional minutes.
Remove from heat.
Stir in butter, lemon peel, lemon juice, and food color.
Pour into pie crust.
Bake 8 - 10 minutes at 350 degrees.
While baking, prepare the meringue mixture.