Mushrooms and Onions for Steak This is how I sauté mushrooms and onions to serve with grilled steak. I've been doing it this way for years and never really thought of it as a recipe until today when my husband mentioned that it was the best he'd ever had. If you have leftovers, make an omelet with them with smoked swiss cheese and serve with hot, steaming bowls of tomato soup with basil. Just trust me on that.
Sauteed mushrooms and onions are sooo good on top of a juicy steak or good old fashioned hamburger. It's an umami tsunami! Pretty straight forward recipe featuring mushrooms, onions, soy sauce and red wine.