1 tsp. oregano
1 tsp. black peppercorns
1 clove garlic
1 tsp. salt
1/3 c. vinegar
1/2 c. olive oil
2 (4 1/2 oz.) jar whole mushrooms

Mix first six ingredients and shake well. Add mushrooms. Marinate in refrigerator. Shake off. Refrigerate several hours before serving. Can be made up to 3 days ahead and will keep up to 1 week.