Portabella Cheese Steak

Ingredients:
6-inch sourdough roll
1 yellow onion
1/2 portabella mushroom
3 slices muenster cheese
4 tbsp butter
1 1/2 tbsp vegetable oil
2 tbsp olive oil

Dice an onion.  Heat the butter and vegetable oil in a skillet.  Put the onion into the skillet and sautee until brown. Heat olive oil in a skillet.  Cook the portabella mushroom in the skillet until cooked on all sides.  Put mushroom and cheese into the skillet with the onions and sautee until cheese is melted.  Slice the roll lengthwise in half but do not separate the two halves.  Fill a large pot with an inch or two of water.  Place a collander over the pot and put the roll into the collander.  Cover with the pot's lid and set water to boil(You may of course use a proper steamer if you have one).  Once the water boils bring it to a simmer until the roll is moist and soft.  Put the roll onto a plate and carefully empty the contents of the skillet onto the roll.  Enjoy!