My dad loved A1 and worcestershire, he would always make this side to go along with our steaks. If you don't like A-! omit it and add lemon juice and some soy sauce to taste.
- in heavy skillet saute mushrooms in olive oil and butter until almost done.
- add garlic and onion and cook until until onions are done to tender crisp.
- add A-1 and worcestershire mix well until heated through.