Place 1 heaping tablespoon stuffing on each piece of steak.
Roll up each piece jellyroll fashion; tie each end with string.
Brown beef rolls on all sides in hot oil in large skillet; transfer to a small roasting pan, reserving pan drippings in skillet. Set rouladen aside.
Brown onions in reserved pan drippings.
Remove onions to roasting pan; reserve pan drippings in skillet. Set aside.
Combine brown bouquet sauce and pan drippings; add flour, stirring until smooth. Gradually add wine; cook over medium heat, stirring constantly, until thickened.
Combine brown bouquet sauce and pan drippings; add flour, stirring until smooth. Gradually add wine; cook over medium heat, stirring constantly, until thickened.
Pour wine mixture over rouladen and onions; add bay leaf. Top with mushrooms. Cover and bake at 350 for 1 hour,
Remove bay leaf before serving.
Sprinkle with parsley, and serve with hot buttered noodles, if desired.