Using two small serving dishes, start to build! First dip a ladyfinger into the espresso/rum mixture for 1-2 seconds and place in the bottom of the dish. Create 1 even layer of soaked lady fingers in each dish then top with a layer of strawberry slices and then the chocolate mascarpone. Repeat with another layer of soaked lady fingers, strawberries and then the plain mascarpone in each dish. Top each with the shredded chocolate and place in the refrigerator to set for at least 4 hours.