The classic button mushroom (garicus bisporus) is an edible fungus found mainly in the grasslands of Europe and North America. It has two color state - brown and white. This mushroom is particular popular as a pizza topping in many restaurants and can be used in various traditional stews.
Button mushrooms are low in calories, great sources of fibre and protein (which is great for a plant based diet). They also provide many nutrients including Vitamin B, Selenium and Potassium.