This grilled portobello mushroom burger recipe will be a hit with vegetarians and meat eaters alike! It's juicy, meaty, and filled with rich, savory flavor.
Prepare the mushrooms by removing the stems and cleaning the caps with a damp cloth or paper towel. Place the mushrooms in a rimmed plate and drizzle with olive oil, balsamic vinegar, tamari, salt, and pepper. Use your hands to help coat the mushrooms on both sides.
Heat a grill or grill pan over medium heat. Place the mushrooms, gill side up onto the grill pan. Cook 5 to 7 minutes per side, or until mushrooms are tender.
Place the mushrooms onto the buns and serve with desired fixings.