This is by far the most delicious combination of ingredients that I have had on a pizza... ever! I came across a picture of this pie on Flickr and simply needed to recreate it (http://bit.ly/fbAKx0)
I'm not going to give specific measurements for each ingredient - just make it according to preference using each. It's best when the dough is rolled out thin and becomes nice and crunchy.
Fresh pizza dough
Portobello mushrooms, sliced
Grana padano cheese, shaved thin
Extra virgin olive oil
My only suggestions are to brush a thin coat of EVOO onto the rolled out dough and bake for maybe 3minutes or so just to get the crunch going... then begin your layering with the mozzarella, after that it's your choice! Drizzle the truffle oil very lightly over the pie, it's extremely salty in excess, but otherwise adds an outstanding flavor to this pie.
Bake for 9-13minutes depending on your oven at 475°