Here’s how to make a portobello mushroom burger that everyone loves: grilled or roasted! Savory and meaty, it’s irresistible with cheese and special sauce. Meet: your perfect portobello mushroom burger. This giant meaty mushroom is irresistible on is own. But add it to a burger bun and pile it high with toppings, and it’s downright outrageous! So you can make it in any season, I’ve got two methods: grilled or roasted. I love it as a vegetarian grill recipe eaten on the patio with the wafting smell of charcoal, but it’s fantastic in any season. Here are all my tricks to the very best portbello mushroom burger. 5 Star Reader Review “Loved this recipe, and it was very quick and easy, too! We topped the portobellos with reduced fat Jarlsberg cheese and your Special Burger Sauce, and they were delicious! This will be our go-to for portobello mushroom burgers.” -Jan Grilled or Roasted: Two Easy Methods To get the v...