Add half the berries, next; then half the whipped cream. Repeat all the layers. Sprinkle the top with additional crumbs. Put in freezer for 1 hour before serving or if made ahead, keep frozen until about 1 hour before serving. Garnish each serving with a whole berry. Serves 12. If you have no spring form pan you can use a 23 cm square baking pan. Make sure it has at least 1 hour to freeze. The first piece is difficult to get out.