For a few years I have noticed some mushrooms coming up after I had burned piles of branches and stumps and so on. At first, I thought these were Volvariellas, but closer inspection showed that they were Pluteus petasatus. They have quite a distinctive cap, grow in clusters and have a characteristic pink spore print.
For some reason, these mushrooms tended to grow at the base of some tall weeds that also grew after the fire. I have no idea what the basis of this association is.
David Arora records this mushroom as being the best of the genus Pluteus, but after frying some up and tasting them, I concluded that they were very similar in taste to Volvariella speciosa and are not something that I would be drawn to eat in particular. Like Volvariella, they would probably go well with some silverbeet or spinach.