Put lemon zest and sugar, pulverize: 20 sec. speed 7.
Gather at the bottom with the help of a spatula and add milk, eggs, flour and vanilla, cook: 7 mins 90° speed 4.
Pour the mixture into a bowl and cover it in contact with transparent film.
Allow to cool to room temperature and then put in the fridge for at least 20 minutes.
Before serving, keep out of the fridge for a few minutes... Buon appetito!
If you don’t have to use it immediately you can let it cool, cover it with transparent film and put it in the fridge inside a container for no longer than 2-3 days. Or you can freeze it in airtight containers.
For the cocoa version you just need to add 3 tablespoons of bitter cocoa powder to the cream and mix.
For gluten intolerant people, replace the flour with potato starch, and for milk intolerant add lactose-free milk instead of regular.