First clean and rough chop your mushooms. Saute the mushrooms in garlic and shallots, don't forget to add salt and pepper to taste. I usually divide everything in half and saute in two batches. Cut the leeks and green onions, and saute them the same way. Take your puff pastry dough let sit out on the counter so you can work with it. Pam a cookie sheet and press the puff pastry dough to cover the bottom. Fork the dough everywhere, you don't want it to rise in the oven. Assembe by placing cheese first, then the mushroom mixture. Drizzle with truffle oil when serving if you can find it. Genaurdi's has it in tiny bottles where the spices are. Bake in oven for about 20 minutes 400 degree oven. You want it to be browned on top.