Melt margarine in large saucepot over medium heat and cook mushrooms, stirring occasionally, until tender, about 5 minutes. Stir in water and Knorr® Vegetable Soup Mix. Bring to a boil over high heat. Remove from heat, then stir in bread crumbs and herbs. Turn into 13 x 9-in. (33 x 23 cm) baking dish.
Bake covered 15 minutes. Remove cover and bake an additional 10 minutes or until golden.