Marinated Mushrooms - cooking recipe

Ingredients

1 lb button mushroom
1 small onion, thinly sliced
2 garlic cloves, minced
1/3 cup white wine vinegar
1/3 cup vegetable oil
1 teaspoon salt
1 teaspoon ground mustard
1 teaspoon pepper

Preparation

In a large saucepan, combine all ingredients.
Bring to a boil over medium-high heat. Cook, uncovered, for 6 minutes, stirring once.
Cool to room temperature. Transfer to a bowl, cover and refrigerate overnight.
The flavor is really enhanced after overnight refrigeration.