Melt the butter with oil in a skillet over medium-high heat.
Stir in the balsamic vinegar, oregano, garlic, and mushrooms.
Stir and cook for about 30 minutes, until tender.
4 servings
1
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.