Grilled Portabellas with Caramelized Onions and Avocados Recipe -
Grilled Portabellas with Caramelized Onions and Avocados Recipe
  • READY IN 30 mins

Grilled Portabellas with Caramelized Onions and Avocados

Recipe by  

"Big, meaty portabella mushrooms team nicely with cool and creamy avocado slices and rings of slow-cooked red onions. Cook the mushrooms on a grill, or broil them. You get lots of great flavor, but a lot fewer calories, than a regular burger."

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Ingredients Edit and Save

Original recipe makes 4 servings Change Servings
  • PREP

    15 mins
  • COOK

    15 mins

    30 mins


  1. Broil or grill mushrooms on both sides until just tender, about 5 minutes per side. Sprinkle with salt and pepper.
  2. Cook onions in olive oil over medium heat until very tender, stirring occasionally, about 10 to 12 minutes.
  3. Cut avocado in half, remove the pit, and peel and cut into slices.
  4. Toast buns. Top bun bottom with grilled portabella, 1/4 of the onion and avocado slices. Top with bun top.
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Reviews More Reviews

Mar 29, 2010

My plan was to have these with our grilled steaks tonight (without the bun) but Hubs was not amenable to that and, for that matter, really wasn't too enthused about trying it period. He did agree, however, to have this as a light lunch (which I thought was weird, but whatever. I was lucky he was a good sport and tried it at all). We both agreed to have this on its own, without the bun. We both enjoyed it! I thought it would have been better with any number of seasonings and/or sauces, but Hubs said he liked the simplicity of it just as, with just a bit of salt and pepper. While it was okay for a light lunch, I would still prefer this (again, without the bun) as either a side dish or warm salad. Nice presentation, tastes wonderful and I feel like I did something healthy and good for myself!

Apr 28, 2010

very good. i thought you carmalized onions with sugar. added a little splenda to onion. very good. DH said onion made the recipe- we didnt use the bun


17 Ratings

Jan 18, 2010

Very tasty! I seasoned them lightly with Montreal Steak seasoning and added a slice of provolone! Great meatless meal!

Apr 21, 2010

I used my panini maker to grill the portobellos - easy and quick! I also added some crumbled gorgonzola cheese and sliced tomatoes to the sandwich. Tasty!

Mar 03, 2010

Hit the spot! Perfectly simple and tasty. I put a slice of baby swiss on top. Will make again.

Jun 23, 2010

Loved it! My Husband gave it 5 stars and that is hard to get! I did change it a bit as I did not have an avocado. Instead, I added some fresh picked rosemary and thyme to the mushrooms as they were finishing on the grill, added some Swiss cheese and then added sliced tomato with fresh picked basil. Served it on a toasted bagel thin bun. Delicious!!

May 11, 2010

Very good. I thought it would need some more condiments but it was fine without it. Very weight watchers friendly.

Apr 07, 2010

Loved this recipe! My 12 year old said she now prefers this over a hamburger! We added mayo on the bun. She said she would like to add mozerella to hers next time. I like it as is.


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  • Calories
  • 241 kcal
  • 12%
  • Carbohydrates
  • 28.1 g
  • 9%
  • Cholesterol
  • 0 mg
  • 0%
  • Fat
  • 12.6 g
  • 19%
  • Fiber
  • 4.7 g
  • 19%
  • Protein
  • 5.4 g
  • 11%
  • Sodium
  • 501 mg
  • 20%

* Percent Daily Values are based on a 2,000 calorie diet.

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