Slice mushrooms. In a large pan, heat oil and margarine on medium heat until margarine is melted and bubbly. Add mushrooms and let sauté.
When mushrooms release their liquid and start to brown (about 5 minutes) add salt, pepper, balsamic, and Hedessent flavourings.
Continue to cook another 1-2 minutes or until most of moisture is gone from the pan. Add parsley and let cool.