Cream:Blend the banana with a hand blender. Beat the cream, with the sugar, vanilla essence, banana and xanthan gum until you obtain a really firm cream.
Pie:Grind the cookies and add melted butter (a little) until you obtain a wet sand-like texture. Put the mixture in an individual container as a base.
On that base, put a good layer of dulce de leche.
On top of that, put a layer of bananas cut into slices.
Complete with cream.
Enjoy!