Layers of cookies and fruit

Ingredients and method
In a pot we put 4 cups of liquid milk, three tablespoons of sugar and 8 tablespoons of custard. Stir them cold, with the gas on, and stir until it boils and the mixture boils.
I turn off the gas, set the pan aside and leave the custard in the pan for a quarter of an hour, stirring it from time to time until a layer forms on the surface.
Place the custard on a plate, cover the top with cling film and put it in the refrigerator until it cools.
On the side, whip a cup of liquid cream (alternative is two cans of cream, whip them with a regular whisk), and when it thickens, I add half a cup of sweetened condensed milk and whisk.
Pour the custard in batches and stir with a whisk until there are no more lumps (stir the cream before putting it on the cream)