Grilled Balsamic Portobello Burger with Basil Aioli

Juicy portobello mushrooms marinated, grilled and stacked with melty Swiss cheese, grilled red onion, roasted red pepper, lemony arugula and basil aioli. It's an easy gluten-free, vegetarian meal that's savory, juicy and bursting with flavor! Quick enough for a weekday, tasty enough for a weekend cookout.

gluten-free Grilled Portobello Sandwich basil mayo easy recipe
Grilled Balsamic Portobello Burger with Basil Aioli

An easy + unbelievably delicious gluten-free, vegetarian Summer meal!

So excited for you to try these gluten-free Grilled Portobello Burgers with Basil Aioli!

They are sure to become a go-to Summer meal! Quick and easy enough for a weekday, tasty enough for a cookout!

Juicy portobello mushrooms marinated, grilled and stacked with melty Swiss cheese, grilled red onion, roasted red pepper,  lemony arugula and fresh-tasting basil aioli.

It’s a gluten-free vegetarian meal that’s savory, juicy and bursting with flavor!

gluten-free Grilled Portobello Sandwich basil mayo easy recipe

So let’s make them!

They come together super quickly– making them a great last minute meal!

I like to start by marinating the portobellos, then making the basil aioli and getting all the fixings ready because it all comes together quickly once you start grilling!

Also, you will note that the recipe is written for 2 large portobello caps… that is for 2 reasons:

  1. that is how they are usually sold in my local stores, and
  2. we often make these as a vegetarian alternative so usually only need 2 in our house.

Pointing this out so that you can double the recipe as needed.

gluten-free Grilled Portobello Sandwich basil mayo easy recipe

Let’s start with the Balsamic Portobellos:

Portobellos are by nature are rich, meaty and juicy, but the balsamic marinade deepens their rich savory flavor and makes them extra juicy and delicious!

Here’s what you’ll need

2 large porotbello caps

olive oil

balsamic vinegar

garlic

salt & pepper.

All you do is whisk the marinade together, then generously coat the portobello caps and let rest while you prepare the other ingredients.

While they marinate, make the Basil Aioli…

A simple basil aioli is the easiest way to dress up your mayo and add fabulous summer-y flavor to your burger!

It’s creamy and has the best flavor!

I think you’ll find that you want to put this on every sandwich you make this summer!

All you need is:

avocado mayo (or mayo of choice)

olive oil

garlic

lemon juice

fresh basil

Whisk it together until well combined and creamy and set aside.

Now let’s talk toppings!

A toasted gluten-free bun with some or all the fixings, makes this a delicious and satisfying gluten-free meal!

Here’s what on the burger in addition to the basil mayo:

Swiss cheese (or cheese/ dairy-free cheese of choice)

grilled red onion

jarred marinated roasted red peppers

lemony arugula (just arugula tossed with lemon juice, olive oil and seasoned with salt & pepper — so good I usually make extra as a side salad!)

gluten-free Grilled Portobello Sandwich basil mayo easy recipe

 

The combination is super flavorful, juicy and satisfying!

So when you have all your ingredients ready, it’s time to grill and assemble!

  • The portobellos grill for 5-7 minutes each side (grill closed)
  • then melt the cheese on the grilled portobello
  • the onions grill the the last five minutes
  • the burger bun is toasted for the last minute or so… so it all comes together quickly!
  • Assemble by slathering the burger bun base with the basil mayo, adding the grilled portobello with melted cheese, top with the grilled onion, then chopped red pepper and finally the arugula and burger bun!

Then you have a perfect, juicy portobello burger!

Let me be honest here, since they are juicy, these can also be nice n’ messy to eat, especially when they are hot… but that’s the way it should be!

So whether you’re looking to feed the vegetarians at your table or add some gluten-free meatless meals to your week, this will be a hit!

Hope you love it as much as we do!

gluten-free Grilled Portobello Sandwich basil mayo easy recipe

For more vegetarian burgers, try our:

White Bean Quinoa Burgers

Black Bean Burgers

PIN it!

Scroll down for recipe and leave a comment/ rating if you love it!

Recipe

 

gluten-free Grilled Portobello Sandwich basil mayo easy recipe
Share on Facebook Pin Recipe Print Recipe Rate this Recipe
5 from 1 vote

Balsamic Portobello Burger with Basil Aioli

Juicy portobello mushrooms marinated, grilled and stacked with melty Swiss cheese, grilled red onion, roasted red pepper, lemony arugula and basil aioli.  It's an easy gluten-free, vegetarian meal that's savory, juicy and bursting with flavor! Quick enough for a weekday, tasty enough for a weekend cookout.
Prep Time15 mins
Cook Time15 mins
Course: Main Course, Lunch, Dinner, Veggies, 30 Minute Meals, Summer Recipes
Cuisine: Gluten-Free, Nut-Free, Vegetarian/ Vegan optional
Keyword: easy gluten-free dinner recipe, easy gluten-free meal, grilled portobello burgers, grilled portobello sandwich, basil aioli, basil mayo, vegetarian grilling option
Servings: 2 burgers
Author: Healthy Gluten-free Family

Ingredients

Portobello Burgers

  • 2 large portobello mushroom caps cleaned, stems cut as desired. I tend to cut them so they are nearly flush with the mushroom cap.
  • ¼ cup olive oil
  • 3 tablespoons balsamic vinegar
  • 3 cloves garlic, minced
  • salt and pepper

Toppings

  • 2 slices red onion
  • 2 tablespoons chopped jarred marinated roasted red peppers,
  • 1 cup arugula You will use 1/2 cup per burger but since I love arugula, I usually double and eat extra on the side.
  • 1 tablespoon lemon juice
  • ½ tablespoon olive oil
  • salt and pepper to taste
  • 2 slices Swiss cheese (or cheese of choice) skip or substitute if dairy-free
  • 2 gluten-free burger buns

Basil Aioli

  • ½ cup avocado mayo
  • 1 clove garlic, minced
  • 1 tablespoon olive oil
  • 1 teaspoon fresh lemon juice
  • 2 tablespoons chopped fresh basil

Instructions

Portobello Burgers

  • Preheat grill or oven to 375 degrees F *
  • Marinate portobellos: in a large bowl whisk olive oil, balsamic vinegar and garlic. Add cleaned portobello mushrooms and use a spoon or brush to toss and make sure they are generously coated. Sprinkle with salt and pepper and let marinate for 10-15 minutes (or longer if desired) while you prep all the fixings and basil aioli.
  • Arugula: mix arugula with lemon juice and olive oil, sprinkle with salt and pepper. Set aside.
  • When ready to grill, carefully spray or coat grill lightly with oil. Place portobellos on the grill stem side down and brush on excess marinade (and keep marinade so you can do the same to the other side when you flip it). Grill 5-7 minutes per side, grill closed. When you flip the burger, brush on additional marinade. The portobellos will look tender-- the cooking range is because some are thicker than others.
  • When you flip the portobellos, put onion slices on the grill and let cook 5 minutes.
  • After the portobello has cooked 5-7 minutes per side, flip the portobellos again (they will be stem side down now) and top with cheese, cover and let melt, approximately 1 minute.
  • Option but recommended: grill burger bun for 1 minute
  • Assemble: Slather burger bun base with basil mayo, add grilled portobello with melted cheese, top with grilled onion, chopped pepper, arugula and burger top. Enjoy!

Basil Aioli

  • Whisk together all the ingredients until well combined and creamy. Set aside. Can be made ahead and stored in the refrigerator.

Notes

*If you don't have a grill or prefer to use your oven, preheat oven to 375 degrees F and roast portobellos for about 15 minutes or until tender.
** Portobellos could be made ahead and heated up or enjoyed room temperature.
Tried this recipe?Mention @HealthyGFFamily or tag #HealthyGFFamily!
Summary
recipe image
Recipe Name
Balsamic Portobello Burger with Basil Aioli
Author Name
Published On
Preparation Time
Cook Time
Total Time

Leave a Reply

Your email address will not be published.

Recipe Rating