Marinated Mushrooms

1 pound medium sized mushrooms
3 green onions, thinly sliced
2/3 cup salad oil
4 tablespoons lemon juice
1 teaspoon worcestershire sauce
1/2 teaspoon salt
1/2 teaspoon dry mustard
1/8 teaspoon pepper

Rinse mushrooms. Dry and slice about 1/4" thick. In a container, mix the remaining ingredients and shake well. Pour over sliced mushrooms and mix. Cover and refrigerate at least 4 hours. Stir a few times while in the refrigerator.