Step 1: Make the Crust
In a bowl, combine flour, sugar, and salt.
Cut in cold butter until mixture resembles coarse crumbs.
Add egg yolk and ice water. Mix just until dough forms.
Wrap and chill for 30 minutes.
Step 2: Bake the Mini Shells
Preheat oven to 350°F (175°C).
Roll dough to ⅛-inch thickness.
Cut circles and press into greased muffin tin wells or mini tart pans.
Prick bottoms with a fork.
Bake 12–15 minutes until lightly golden.
Cool completely.
Step 3: Prepare the Lemon Filling
In a saucepan, whisk sugar and cornstarch.
Gradually whisk in water and lemon juice.
Cook over medium heat, stirring constantly, until thickened.
Remove from heat and whisk in egg yolks.
Return to heat for 1–2 minutes, stirring continuously.
Remove from heat and stir in butter and lemon zest.
Spoon warm filling into cooled crusts.
Step 4: Make the Meringue
In a clean bowl, beat egg whites and cream of tartar until soft peaks form.
Gradually add sugar while beating.
Continue beating until stiff, glossy peaks form.
Mix in vanilla extract.
Step 5: Top & Toast
Pipe or spoon meringue over lemon filling, sealing edges completely.
Toast with a kitchen torch or bake at 400°F for 5–7 minutes until lightly golden.
Cool completely before serving.