Step 1: Prepare & Blind Bake the Crust
Preheat oven to 375°F (190°C).
Roll out dough and place in a 9-inch pie dish.
Prick bottom with a fork.
Line with parchment paper and add pie weights.
Bake 12–15 minutes.
Remove weights and bake 5 more minutes until lightly golden.
Cool slightly.
Step 2: Make the Lemon Filling
In a saucepan, whisk sugar, cornstarch, and salt.
Gradually whisk in water.
Cook over medium heat, stirring constantly, until thickened.
Lightly beat egg yolks in a small bowl.
Slowly whisk in a small amount of hot mixture to temper yolks.
Return yolk mixture to saucepan.
Cook 1–2 minutes more until thick and smooth.
Remove from heat and stir in lemon juice, zest, and butter.
Pour hot filling into baked crust.
Step 3: Make the Meringue
In a clean bowl, beat egg whites with cream of tartar until soft peaks form.
Gradually add sugar while beating.
Beat until stiff, glossy peaks form.
Mix in vanilla extract.
Spread meringue over hot filling, sealing edges to the crust.
Step 4: Bake the Meringue
Reduce oven to 350°F (175°C).
Bake 10–15 minutes until meringue is golden brown.
Cool at room temperature for 1 hour.
Refrigerate at least 3 hours before slicing.