Heat the oven to 350 F. Lay a dish towel on a work surface and sprinkle it lightly with water. Thaw the phyllo dough package according the manufacturer’s instructions. Unroll the sheets on the towel and then cover it with a second damp dish towel. When unrolling them I encountered several cracks and cuts in the sheets. Do not panic. They are easily repairable and do not make any difference in the desert.
Melt the butter in a small saucepan. Brush a 9 x 13 inch baking pan with melted butter. Take a sheet of phyllo dough and carefully spread it in the pan, folding the sheet in such a way that it fits the pan.
Brush the layered sheet with butter and gently press it into the sides and corners of the pan.
Lay another sheet on top and brush with butter. Do the same with the third of the sheets. Once ⅓rd of the sheets have been used, scatter half the nut filling over the layers.
Layer another third of the sheets in the pan, buttering each one and pressing into the corners and sides. Then sprinkle the remaining half of the nut mixture evenly.
Layer the last third of the sheets, buttering them and pressing them the same way as we did with the previous layers. Brush the top most layer thoroughly with butter and pour any remainder of butter on the top (I ignored the last step. I did not pour the remaining butter. I just liberally brushed the top layer and left it at that).
With a small knife, cut diagonal lines around ½ inch deep to mark out the shape. Do not press down too much when cutting.
Bake on low shelf for around 1 hr 15 mins (It took me exactly 1 hr) until golden.