Crush the speculoos biscuits in a bowl. Add the melted butter. Mix well. In individual pastry circles, spread the biscuits over 5 mm and press down with the back of a spoon. Set aside in a cool place.
Assembly Remove the panna cotta from the freezer. Spray with white velvet spray. Place on the speculoos biscuit. Add raspberry coulis in the middle and decorate with a flower (from maison_sauge).
For the raspberry coulis, mix 50g of fresh raspberries with a little powdered sugar. You can strain it through a fine sieve to remove the seeds.