As with the plum jam, this recipe also uses “bistrica” plums. Of course, other kind of blue plums can be used, but with “bistrica” the dumplings will give the most of it. There are two ways of making this meal: either with the stone or without (if you make without the stone replace it with sugar cube). I usually make with the stone to keep the plum consistent. The dough is usual potato dough as you make for gnocchi.