Place the kadaif in a tray. In the middle, put crushed walnuts.
Arrange slices of butter on top. Bake until browned.
After it bakes and cools, pour on a syrup, which you've made from the sugar, water and lemon juice. The syrup needs to boil for 20 minutes.
The kadaif needs to be cold, but the syrup - lukewarm.