You can replace the puff pastry with many many other options - croissants, baked bread, Millefoglie puff pastry biscuits, even cornflakes! But I assure you that puff pastry takes the dish to another level.
Adjust sugar to your requirements. 1 cup sugar was a tad on the higher side for us, just a tad...
The milk mixture is your choice - you can use a mixture of milk and condensed milk, without using the sugar. Or you can even use just milk and sugar.
I really wanted to add 1/4 tsp of cinnamon powder as well, but just missed out! Would have given a lovely flavor...
I missed to use pine nuts!!! This is a nut used in almost all Arabic baking, whether sweet or savory. Though it was not missed much as there was enough of crunch in the dessert, I would have loved to add it to give it a more authentic feel.