My friend Graham showed me this fly a few years ago. He swears by it and uses it everywhere from Lake Ontario tributaries to high mountain streams in California.
It's simple to tie. I wrap chartruese thread on the hook then wrap micro tubing over the top. Use a little white egg yarn for the viel and finish off the head. Graham likes to use Christmas tree tinsle for an underbody and chartruese tubing.
Tie them up now because it's that time of year and the brown trout from the lake will be hungry for some Graham Crackers!