Preheat the oven to 180'C
Mix together the egg whites, icing sugar, flour, ground almonds and the powdered green tea
Melt the butter until it is deep nut colour - make sure not to burn it! Mix in to the dry ingredients
Butter your financier moulds then fill with the financier batter
Sprinkle the fleur de sel and the sesame seeds over the top and then bake in the oven for 15-20 minutes
Allow to cool before removing from the moulds to serve.