MASS: Mix the butter, sugar, 1 egg yolk, wheat flour, cornstarch, baking powder and 1 spoon of squeezed lemon, with your hands until it forms crumbs. Reserve.
CREAM: In a bowl, beat the condensed milk, 2 egg yolks, 6 spoons of the squeezed lemon with a fouet, until the mixture is homogeneous. Reserve.
In a shape with a false bottom, deposit half of the farofa and then half of the cream.
Make a layer with the banana slices.
Follow with the rest of the cream and finish with the farofa.
Bake until the farofa is lightly golden.
Serve hot and accompanied by a scoop of ice cream.