Heat the olive oil and butter in a skillet over medium to high heat. Add garlic and mushrooms to skillet and saute for about 5 minutes, stirring occasionally making sure the mushrooms cook on both sides. Season with salt and pepper.
When the mushrooms are done to your likeness, I like mine a little more done so I saute mine for more like 7 to 8 minutes, remove from heat, sprinkle with the Parmesan cheese and parsley.
Please keep in mind that nutritional information is a rough estimate and can vary greatly based on products used.