Learn how to grill portobello mushrooms with an easy marinade recipe! Soy sauce and balsamic make the best flavor combination for this simple vegetable side dish.
Use a slightly damp paper towel and gently pat the mushrooms to clean off any dirt. Do not run them under water as they can become rubbery and waterlogged.
Combine the marinade ingredients in a casserole dish.
Add the mushrooms, round side up. Use a pastry brush to periodically brush the marinade on top while the bottoms sit in the liquid.
Marinade for 10-30 minutes.
Clean the grill grates.
Preheat the grill to medium, (about 350 degrees, or up to 400). Let the grill preheat for 15 minutes.
Place some oil on a paper towel and use grilling tongs to run it along the grates to mitigate sticking.
Use a spatula to carefully remove the mushrooms from the marinade and place them on the grill.
Grill for 3-4 minutes per side, use grilling tongs to remove and serve with fresh garnishes.
Tip: Fresh arugula makes a great edible garnish with these mushrooms. Fresh rosemary is a visually appealing garnish as well.