Another indisputable advantage of this baking (as well as many other types of puff pastry) is the minimum time spent.
Immediately put the oven to warm up to 220 degrees and take out the defrosted dough.
Now prepare the custard: in a saucepan with a thick bottom, mix the yolk, sugar, flour, milk and vanilla seeds, put on a slow fire and bring almost to a boil.
When the mass begins to thicken, turn off the stove and stir vigorously for a couple of minutes.
Transfer the cream from the pan and let it cool slightly.