For the pancake batter: in a bowl, combine the flours and salt.
Break the egg and mix coarsely, then gradually add the milk while whisking vigorously.
Melt the butter, then add it to the appliance.
Then let it sit in the fridge for 1 hour.
Crush the banana with a fork
Melt chocolate in a bain marie
Garnish your pancake with spread and banana puree,fold it into a triangle and decorate with liquid chocolate and hazelnuts