Gently rinse & pat dry the mushrooms. Trim to a nuiform size & set aside. Saute garlic in oil over medium heat for 15 to 20 seconds. Add mushrooms & saute for 3 minutes. Add rosemary & margarine & cook until the margarine is melted, about 30 seconds. Sprinkle in the flour & cook, stirring constantly. Add remaining ingredients & stir until the liquid is slightly thickened &^ mushrooms are tender. About 4 minutes.