Portobello Recipe - Roasted Mushroom Side Dish / Appetizer Portobello mushrooms are from Mars... A UFO shaped meaty treat magically grows on composted poo... Yep an alien species! I am always amazed by their interesting structure (pop off the stalk and observe the texture) and how they seem to hover somewhere between the animal and veggie world. Maybe they are actually more like fish, they do have gills. Anyways enough of the tangent… This recipe for preparing portobellos is SUPER simple and will give you the confidence to just pick up a few mushrooms and make them ...