In a bowl, add the egg whites, and using an electric mixer, beat them until stiff peaks form.
Now, add the sugar, beat for another minute and set aside.
In a saucepan, add the milk, the vanilla essence and the condensed milk, stir until the mixture starts to boil. After that, turn off the heat.
Using a tablespoon, gradually add the egg whites to the mixture we just made and let them cook in the mixture for 10 seconds on each side.
Transfer the egg whites to a nice serving dish, top with lemon zest and set aside.
In a bowl, add the egg yolks and the cornstarch, mix well.
After that, gradually add 3 scoops of the milk syrup we made and keep mixing.
Next, transfer this egg yolk mixture to the saucepan filled with the syrup, stir until it combines and gains consistency.
Once you’ve done that, gradually pour this syrup in the dish filled with the egg whites.
Take to the fridge and let it chill for at least 6 hours.
Serve.