How to make Lemon meringue pie (lemon tart)

Instructions

1. Prepare lemon juice and lemon zest.
2. Put water + lemon juice + sugar + cornstarch in a pot and boil until thickened, then remove from heat.
3. Add butter + lemon zest and mix until butter is melted, then add egg yolk and mix.
4. Transfer to another bowl, cover with cling wrap, and cool in the refrigerator.
5. Lemon cream on the tart sheet.
6. Whip the egg whites in a bowl and when bubbles rise, add lemon juice and add sugar 3 to 4 times while whipping to make a hard meringue.
7. After squeezing the meringue on the lemon cream, bake in an oven preheated to 200 degrees for 3-5 minutes.