Sprinkle about a tsp of cinnamon over the pecans and mix the pecans with the cinnamon well. Sprinkle a layer of pecans , about ⅓ of the pecans, over the first set of phyllo sheets.
Melt one stick of the butter and using a brush, brush the bottom and the sides of the baking dish. Place one sheet of phyllo at the bottom of the dish, then butter the top of the sheet. Place another sheet on top of it and brush the top again with butter. Repeat this until you have about 6 pastry sheets.