What are Oyster Mushrooms? / Cheesy Mushroom Crostini Recipe

Flipping fungi Batman! Today we're talking about a 'shroom that'd get Sebastian singing "Under Tha Sea..." THE OYSTER MUSHROOM! Nom! ; Often unexplored the oyster mushroom packs serious flavor, and cooks up beautifully, yet can be intimidating to newcomers. So I learned about it for today's What's This Food?! and made a delicious Crostini out of it.