1. Peel and slice the onions. Stem and slice the mushrooms.
2. Heat the oil over medium high heat. Add the onions and
sauté until
translucent and just beginning to brown.
3. Add the mushrooms, season with salt and pepper and
sauté until most of the
moisture has been absorbed. Set aside to cool. Add the shredded cheese.
4. To make the Filo triangles you will need a package of frozen Filo dough
that has been thawed overnight in the refrigerator. You will also need a
can of vegetable cooking spray. Unfold the dough so that it is a rectangle
with the long side pointing toward you. Cut a 2 1/2 inch vertical strip
from the dough and stack the strip in front of you. Spray the top2 sheet of
dough with cooking spray. Place a small amount of filling in the lower
corner of the strip and fold over into a triangle as if you were folding a
flag. Continue with the next strip and cut fresh strips from the dough as
needed. Place the completed triangles on a baking sheet and brush with
cold water or spray with vegetable cooking spray. Bake in a preheated 375
degree oven for 20 minutes or until golden brown. Serve warm.