Pour into food processor biscuits and the butter. Grind until you get crumbs oil. Pour them in a baking dish with a rolling board and pinched shape base. Soak the gelatin in 1/4 cup cold water and leave to swell. Then dissolve it in a water bath (or microwave) and cool. Cream the feta cheese stir it with sugar. add cream shattered. Puree in a blender pieces Mars and add them to the mixture, and then cooled them and gelatin. Pour the cream over the biscuit pad and leave in the fridge to harden for a few hours.