In my previous post about our office Christmas party i mentioned a vegetarian in the office. I would like to do something with a Portabella mushroom for her and her husband. I have taken a large portabella brushed with olive oil and placed a tomato in olive oil and balsamic vinegar with some mozzarella and parmesian cheese on top. grill on egg direct raised grid till cheese is melted. any other suggestions? i have also seen some people advocate taking the gills out?