In greased 11"x18" deep pan. Each layer: 1 fillo dough, brush with butter (repeat 5 times). Next layer, dough, melted butter, sprinkle with walnuts (ground). Repeat for 10 to 15 layers. Top 5 layers, same as bottom. Dough, brush with butter. (This pan size used about 1 1/2 to 2 pounds of ground walnuts.) Top layer is brushed with butter, cut into diamond shapes. Bake in 275 degree oven for 1 to 1 1/2 hours. When taken from oven, pour syrup on top.