Take one large field mushroom , chop the stem off at the bottom end and discard. Peel the mushroom. Chop up the rest of the stem fairly finely. Now comes the fun part - chop any vegie you like to name, place it on the base, along with the chopped stem. Personally, I like tomato, onion, garlic, some herbs and spices. Spray with olive oil, grill and eat.