Jul 14 2026
RestaurantsComo Smoke and Fire - SouthPortabella Burger Recipe

Portabella Burger Recipe

Time30m
Serves4

This is a vegetarian’s dream. A fire grilled portabella mushroom topped with grilled zucchini, squash, red onion, roasted red peppers, your choice of cheese and chipotle mayo with a brioche bun.

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Ingredients

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Mushroom and Vegetables

Condiments and Cheese

Buns

Seasoning

Method

Preparation of Ingredients

  1. 1

    Prepare the Vegetables

    Slice the zucchini and yellow squash into thin rounds and slice the red onion into rings.

  2. 2

    Marinate the Mushrooms

    Remove the stems from the portabella mushrooms and brush both sides with olive oil. Season with salt, black pepper, and garlic powder.

  3. 3

    Prepare the Roasted Red Peppers

    If using jarred roasted red peppers, drain them well. If using fresh, roast them in the oven or over an open flame until charred, then peel and slice.

Grilling

  1. 4

    Grill the Portabella Mushrooms

    Preheat the grill to medium-high heat. Grill the portabella mushrooms for about 5-7 minutes on each side until tender and grill marks appear.

  2. 5

    Grill the Zucchini and Squash

    Place the sliced zucchini and yellow squash on the grill. Cook for about 3-4 minutes per side until they are tender and have grill marks.

  3. 6

    Grill the Red Onion

    Grill the red onion rings for about 3-4 minutes per side until they are soft and slightly charred.

Assemble the Burger

  1. 7

    Add Cheese

    Once the mushrooms are off the grill, place a slice of cheese on each mushroom and let it melt slightly.

  2. 8

    Build the Burger

    On the bottom half of a brioche bun, layer the grilled portabella mushroom with melted cheese, followed by grilled zucchini, squash, red onion, and roasted red peppers. Spread chipotle mayo on the top half of the bun.

  3. 9

    Serve

    Close the burger with the top half of the bun, serve immediately, and enjoy your delicious portabella burger!

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