If you like mushrooms on toast or other ways, this is my version.
I buy flat Portabella mushrooms when Coles have stock and they are fresh, slice them, and cook them in buttery pro-activ. I then add 1 or 2 small cans of Coles sliced mushrooms, depending on the amount of mushrooms I used. The Coles brand is from the USA whilst the Edgell sliced mushrooms are from Belgium and are nowhere near as nice.
I eat it on a toasted slice of Coles multigrain toast bread. I always have enough for several days so the next few breakfasts are even quicker. Can also be used as a mushroom sauce for steaks.