Portabella stuffed mushrooms

4-large portabella mushrooms
3-tomatoes chopped
1-med onion chopped
1-2TBS of garlic
2-TBS olive oil
salt and pepper
optional:
cumin
basil
cheese

Preheat oven to 400*.  Take the stem off your mushrooms and scoop out the inside of the mushrooms.  Then wipe them with a damp cloth to clean them.  Place mushrooms in a baking dish with a little bit of a side.  Saute onion in pan with a little bit of olive oil until it is slightly brown.  Add garlic, tomatoes, and your other seasonings (this one really depends on our taste) cook for about 5 minutes.  Place mixture in the mushrooms and bake for 20 minutes.  You can add cheese to the mushroom when they are done if you like.