Grilled portobello mushroom burgers with grilled eggplant, roasted red peppers, red onion, arugula, and pesto sauce are a wildly flavorful all the veggies veggie burger!

The Ultimate Grilled Portobello Burger with grilled eggplant, roasted red peppers, red onion, arugula, and pesto sauce | TheRoastedRoot.net #healthy #vegetarian #recipe

The other day, I was contemplating the meaning of the veggie burger, and all of a sudden I was hit in the frontal lobe with an idea.

Rather than making veggie burger patties, which can be time consuming, sometimes fall apart, and require more bases than Iโ€™m willing to put out on most evenings after a long day of work, why not just make a veggie burger that is just that – veggies.

No fancy patties, just some grilled (or roasted) vegetables stacked on top of each other with a funky fresh Basil Pesto Sauce. BOOM! Satisfaction.

So thatโ€™s what I did. I basically put everything I could think of that goes together on this burger.

I grilled up a couple portobello mushrooms and an eggplant, and topped those veggies with roasted red bell pepper (I used jarred, but you can certainly roast your own peppers if thatโ€™s your preference), red onion, arugula, and pesto sauce.

I toasted up some potato buns (you can use a gluten-free bun or go bun-less) with havarti cheese to sandwich everything together. And believe you me, this thing just jives..

The Ultimate Grilled Portobello Burger with grilled eggplant, roasted red peppers, red onion, arugula, and pesto sauce | TheRoastedRoot.net #healthy #vegetarian #recipe

Optional changeups to the burger? Weโ€™ve got plenty.

You can add sun-dried tomatoes, whip up a homemade pesto or paleo chipotle aioli or go with a reduced balsamic drizzle, grill or caramelize the onions rather than leaving them raw, add grilled asparagus or sweet potato, replace the arugula with spinach, etc.

Spread your veggie burger wings and fly!

If you love veggie burgers, also try my Southwest White Bean Veggie Burgers, Sweet Potato Veggie Burgers, or my Moroccan-Spiced Beet Veggie Burgers.

Get your grill on!

The Ultimate Grilled Portobello Burger with grilled eggplant, roasted red peppers, red onion, arugula, and pesto sauce | TheRoastedRoot.net #healthy #vegetarian #recipe

The Ultimate Grilled Portobello Burger

5 from 1 vote
The Ultimate Grilled Portobello Burgers with pesto sauce are a hot sell on the meatless burger!
Prep Time 25 minutes
Cook Time 15 minutes
Total Time 40 minutes
Servings: 2 veggie burgers

Ingredients

  • 2 large portobello mushroom caps
  • 3 tablespoons olive oil
  • 3 tablespoons balsamic vinegar
  • Pinch sea salt
  • 1 small eggplant cut into ยผ- to 1/2 -inch rounds
  • 1 roasted red bell pepper I used store-bought
  • ยผ small red onion sliced
  • ยผ cup pesto sauce
  • Handful baby arugula
  • 2 burger buns of choice toasted
  • 2 slices havarti cheese

Instructions

  • Add the olive oil and balsamic vinegar to a small blender and blend well until smooth. Wash and pat dry the portobello caps and transfer them to a sealable container (or zip-lock bag) along with the balsamic marinade. Allow the mushrooms to marinate at least 15 minutes, up to 1 hour.
  • Heat the grill to medium and brush the eggplant slices with olive oil and sprinkle with salt and pepper.
  • Place the portobello mushrooms and the eggplant on the hot grill and cover. Cook until grill marks appear, about 2 to 3 minutes for the eggplant and about 5 to 7 minutes for the mushrooms. Flip and continue cooking until vegetables are juicy, tender, and cooked through, about another 2 to 3 minutes for the eggplant and 5 to 7 minutes for the mushrooms. Transfer vegetables to a plate.
  • Toast two buns with havarti cheese (or your choice) and layer with a grilled portobello mushroom, a few slices of eggplant, roasted red bell pepper, red onion, and arugula. Drizzle on desired amount of pesto sauce and serve.

Nutrition

Serving: 1Burger ยท Calories: 668kcal ยท Carbohydrates: 65g ยท Protein: 32g ยท Fat: 32g ยท Fiber: 11g ยท Sugar: 13g
Author: Julia
Course: Lifestyle
Cuisine: American
Keyword: grilled mushroom burger, grilled portobello, portobello burger, vegan veggie burgers, veggie burger recipe
Did You Make This Recipe?I want to see it! Tag @the.roasted.root on social media!
Julia Mueller
Meet the Author

Julia Mueller

Julia Mueller is a recipe developer, cookbook author, and founder of The Roasted Root. She has authored three bestselling cookbooks, – Paleo Power Powers, Delicious Probiotic Drinks, and The Quintessential Kale Cookbook. Her recipes have been featured in several national publications such as BuzzFeed, Self, Tasty, Country Living, Brit.co, etc.

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Questions and Reviews

  1. This has me craving summer and grilling all the things! Portobellos and pesto belong together!

  2. Yaaaaaaaas! Oh my gosh, I haven’t eaten breakfast yet, but I WANT that burger right now! Can we make that happen over here?

  3. This is similar to the one I have from Rachel Ray. She puts rosemary in the marinade and a red pepper pesto. I love these. Yours is much easier. I guess I’m off to the 99 cent store for Mushrooms. I’m always surprised when i find a package of two there.