In a pan without turning on the fire, put the condensed milk, cornstarch and nest milk..
After mixing, add the milk and cream and stir again.
Then turn on the fire and leave it until it becomes a cream, then turn off the fire, and throw the white chocolate bar and stir until the chocolate melts..
Then put it on a platter, and throw the bis and put another layer of the cream, then put it in the fridge until it's firm..
Then make a dark chocolate ganache, putting it in the microwave every 30 seconds until it melts, then put the milk cream and stir..
Then throw it on top and take it to the fridge again..
Then just put the other box of bis of your preference 😍