Preheat oven to 200C (400F). Brush a baking dish with melted ghee.
Lay one sheet of fillo, crinkle it, then fold it in half so one part overlaps the other.
Put 1 tsp ground pistachio in the bottom center, then top with a heaped teaspoon of ashta.
Fold the sides in and roll tight to close. Place in the baking dish. Repeat with the rest.
Brush the rolls all over with melted ghee, drizzling any extra on top. Bake on the middle rack 30-40 minutes, until golden.
Make the syrup: dissolve the sugar in the water, then simmer a couple of minutes until slightly thickened. Off the heat, stir in the rosewater and lemon; set aside.
When the rolls come out golden, soak them with the sugar syrup.