Mushroom Turnovers

Yield:	4 Servings
Categories:	Mushrooms

1/2	c	Chopped onion
1/2	lb	Mushrooms; chopped
1/4	c	Butter or margarine
1	pk	(8 Oz.) cream cheese
1/2	ts	Worcestershire sauce
1/2	ts	Salt
1/8	ts	Pepper
1/8	ts	Garlic powder
1		Thinly sliced sandwich loaf of white bread