- 1/3 cup red wine vinegar
- 1/3 cup olive oil
- 1 small onion, thinly sliced
- 1 teaspoon salt
- 2 tablespoons dried parsley
- 1 teaspoon ground dry mustard
- 1 tablespoon brown sugar
- 2 cloves garlic, peeled and crushed
- 1 pound small fresh button mushrooms
- In a medium saucepan, mix red wine vinegar, olive oil, onion, salt, parsley, dry mustard, brown sugar and garlic. Bring to a boil. Reduce heat. Stir in mushrooms. Simmer 10 to 12 minutes, stirring occasionally. Transfer to sterile containers and chill in the refrigerator until serving.