A homemade dessert in 5 minutes

A homemade dessert in 5 minutes that I never get tired of! No need for cooking!
400 ml of milk.
Zest of 1 lemon.
1 teaspoon of vanilla sugar.
Heat until boiling.
2 egg yolks.
40g of sugar.
15g of cornstarch.
Cook, stirring constantly, until thickened.
Let cool.
Juice of 1 lemon.
100g of sweetened condensed milk.
Beat until thickened.
Decorate with cinnamon, cocoa or chocolate.
Place in the refrigerator for 30 minutes.
Instructions :

Once the mixture has cooled, add the lemon juice and sweetened condensed milk.

Beat everything well until the mixture thickens.
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