Roughly chop the kadaif pastry into small pieces and mix well with the melted butter.
If using molasses, mix it with 10 grams of soft butter and generously butter the bottom of the sahan pan with half of the mixture.
Scatter half of the kadaif pastry over butter and press it down with your palms until solid and firm.
Shred the cheese and spread it over the kadaif pastry evenly, leaving one cm around the edges.
Cover the cheese with the rest of the kadaif pastry and press it down until firm and even.
Place the sahan pan over medium heat and 30 seconds later, turn it down to the lowest.
Cook it until golden brown while pressing firmly with something flat. This would take 10 to 12 minutes.
Turn over the künefe on a flat plate. To do that, put the plate face down over the sahan pan and then flip it over the plate cooked side up.
Generously butter the sahan pan with the remaining soft butter and then slip the Künefe back into the pan.
Cook for another 8 to 10 minutes, until nicely browned, pressing firmly to keep the kunefe evenly flat.
Remove the sahan pan from the heat and add the syrup (at room temperature).
Garnish with chopped Pistachio nuts and serve immediately.