These grilled Portobello Mushroom Burgers topped with mozzarella, red peppers, and pesto mayo, are delicious and an excellent vegetarian burger option.
Portobello Burger with Mozzarella
Who doesn’t love a good hamburger? I know I do! But I also love going meatless and really enjoy these Portobello Burgers, especially with pesto mayo and mozzarella, so good!! These are a variation of this Grilled Portobello Mushroom Burger recipe. I marinate and grill the mushrooms and top them with mozzarella, grilled red onions, roasted peppers, and an easy pesto mayonnaise sauce. For some other veggie burger ideas, try my Spicy Black Bean Burgers and Houston’s Veggie Burgers.
Portobello mushrooms are a great meat substitute if you’re trying to reduce your calories or red-meat consumption. Portobellos have a meaty texture and flavor that I enhance with a simple marinade made of balsamic vinegar, soy sauce, olive oil, and Montreal steak seasoning.
How do you prepare portobello mushrooms?
To prep portobellos for cooking, pop off the stems and wipe the tops of the mushrooms off with a paper towel. You can remove the gills on the inside of the mushrooms if you want, but it’s not necessary as they are edible.
What to Serve with Portobello Mushroom Burgers
These portobello burgers would be delicious with a salad like my Italian Chopped Salad or Summer Tomato Salad. You could also serve them with Air Fryer French Fries or Skinny Garlic Parmesan Fries.
Portobello Mushroom Burger Tips & Variations:
- If you don’t have a grill, cook the mushrooms on a grill pan or cast-iron skillet on your stove.
- If you’d like to use homemade pesto for the sauce, try my Skinny Basil Pesto.
- Swap the mozzarella for provolone cheese.
- If you prefer meat, use lean ground beef or turkey patties instead of mushrooms and top with all the same toppings.
More Burger Recipes You’ll Love:
- Greek Turkey Burgers
- Air Fryer Bacon-Burger Bites
- Grilled Hawaiian Teriyaki Burger
- Healthy Salmon Quinoa Burgers
- Chicken Parmesan Burgers
Portobello Mushroom Burger with Mozzarella, Roasted Peppers and Pesto Mayo
Ingredients
- 2 tablespoons jarred or homemade pesto
- 2 tablespoons light mayo
- 4 portobello mushroom caps
- 2 tbsp balsamic vinegar
- 1 tbsp low sodium soy sauce
- 1 tablespoons olive oil
- 1-1/2 tsp steak seasoning like Montreal Steak Grill Mates
- 4 thick slices red onion
- 4 oz fresh mozzarella, sliced thin
- 1 roasted red pepper, jarred or homemade sliced
- 4 whole wheat low calorie buns, I used Martin
Instructions
- Combine mayo and pesto in a small bowl.
- In a large bowl, whisk together vinegar, soy sauce, oil, and Montreal steak seasoning.
- Place the mushroom caps in the bowl and toss with sauce, using a spoon to evenly coat. Let stand at room temperature for 20 to 30 minutes, turning a few times.
- Heat the grill or indoor grill pan over medium heat. When hot, brush the grate with oil or lightly spray the grill pan.
- Place the mushrooms on the grill, reserving marinade for basting. Grill for 5 to 7 minutes on each side, or until tender, brushing with marinade frequently.
- Top the mushrooms with cheese during the last minute of cooking.
- While the mushrooms cook, grill the onions about 1 minute on each side and grill the buns until toasted.
- To finish, spread the pesto on the buns, place the grilled portobello mushrooms on the buns and top with the grilled onions, and roasted peppers.
Delicious! My husband is a meat lover so I put a beef slider patty inside the cap of the mushroom when it was time to grill and it was delicious. The fresh mozzarella was a great touch! We will be making this again.
This flavor combo is a total win! I was happy to have an excuse to thaw a cube of frozen homemade pesto. I also made a deconstructed version by sauteeing a cut-up mushroom cap in the marinade, which I reduced to a thick syrup. Then I mounded the shrooms atop a sliced whole-wheat roll, topped each with red onion and jarred roasted red pepper, sprinkled grated cheese atop, and toasted. Delicious either way!
Wow! Portobello Burgers are a fave of mine and this was amazing 🤩 I omitted the red pepper and forgot the cheese. Bit was still amazing. I’ll be making this often this summer. Thanks again Gina.
This recipe has a plethora of delicious tastes, and it’s easy and quick to make! We love all the SkinnyTaste recipes, but this one is near the top!
Being on the emailing list, I receive many recipes for free, and frequently download them into my AnyList app which is my primary recipe book. Out of appreciation and guilt I have bought several SkinnyTaste books which sit on the bookshelf. After making this recipe, I need to buy another book!
Gina, thank you for your fun and delicious recipes!
Wonderful! Thanks for sharing!
I love a good mushroom burger! For the seasoning on the mushrooms, I used McCormick Grill Mates Steakhouse Onion Burger flavor which I found to really compliment the rest of the flavors. I have also used Mrs. Dash which is pretty good. I served this with French fries from the air fryer cookbook. A super fun end of summer burger-ish meal!
This was absolutely delicious and beyond expectations! Yum!
This was excellent! The whole family loved it. I forgot roasted red peppers, but didn’t really miss it. I brushed a little marinade on the red onion while grilling to give it some extra flavor.
Absolutely delicious, and I was skeptical. I did, though, make more of the marinade than was suggested in the recipe.
This recipe is delicious in a spinach wrap! Thank you!
We exclusively cook with SkinnyTaste recipes because they’ve all been great. We are on 40+ recipes and counting. This has been a recent favorite! Pro tip: for the last grill flip of mushrooms make sure they are gill face up so you can pour remaining marinate in them before cheese. It holds everything perfectly. Thanks for all of the incredible meal experiences over the last two years!
So glad you are enjoying the recipes!!
Thank you so much for offering more meatless suggestions! B I eat a flexitarian diet (meat just twice per week- one of those being fish), and it is difficult to find recipes. It is much easier to add meat to a dish, than to take it away. I realize you are trying to accommodate a lot of different diets, and I just wanted to thank you for all you do! (Also love that there are so many meatless ideas in the new cookbook! I’m so excited to try them)
Thanks Candice! You know you can also use the recipe key on the Skinnytaste site to find more vegetarian recipes! Hope you enjoy!
YUM, just made the other portobello burger for lunch today
YUM! I love Portobello mushrooms! This recipe looks delish! I can’t wait to try it!