Spread crescent roll dough onto a greased cookie sheet, lengthwise. Combine cream cheese, egg, flour, sugar and vanilla; beat until fluffy. Spread over dough. Reserve a few of the nuts to sprinkle on top. Sprinkle combined nuts, sugar and cinnamon over cheese mixture. Fold ends of dough into center over filling. Sprinkle a few nuts on top. Bake in preheated 350 degree oven for 1/2 hour until brown. Cool. Sprinkle with powdered sugar, if desired.