MARINATED MUSHROOMS (Mary Ellen McCormick)

2 pkg. mushrooms
¾ cup oil
½ cup white wine vinegar
½ tsp. tarragon
½ tsp. oregano
2 tsp. chopped onion
2 tsp. chopped garlic
fresh ground black pepper

Mix marinade ingredients. Add mushrooms, gently coating all with marinade. Refrigerate overnight.