Portobello mushrooms are actually considerably larger than the common
small white mushrooms you see in supermarkets. The portobello mushrooms I've seen
are generally 4" to 6" and brownish in color. They also are much more
flavorful than the standard "button" mushrooms and perfect for making this stuffed mushroom recipe. Ingredients: 20-25 medium sized Portobello mushrooms 6 spring onions...
