Take this mushroom and Stuff It!!  Zucchini, Corn & Pesto Stuffed Portabella Mushrooms (aka Portobello) and dressing served over a bed of lettuce for the perfect, filling and healthy meal.  These hearty & meaty mushrooms are a great vegetarian option that everyone will love.  The tangy balsamic, creamy pesto and veggies are a yummy combo.