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Portobello Sandwich

Portobello Sandwich

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4.5 from 2 reviews

  • Author: Sonja Overhiser
  • Prep Time: 15 minutes
  • Cook Time: 15 minutes
  • Total Time: 30 minutes
  • Yield: 4 sandwiches 1x


This portobello sandwich stars a mix of roasted portobello mushrooms, crunchy veggies, and creamy horseradish sauce. It’s to die for!


  • 6 medium (4 large) or 12 ounces portobello mushrooms
  • 1/4 cup olive oil
  • 2 tablespoon soy sauce (or tamari)
  • 2 garlic cloves, minced
  • 2 teaspoons smoked paprika
  • 1/2 teaspoon onion powder
  • 1 teaspoon Worcestershire sauce
  • 1/2 teaspoon kosher salt
  • 4 artisan buns
  • Baby arugula or greens, for serving
  • Pickles, for serving
  • Sliced white onion, for serving
  • 1 recipe Horseradish Sauce, for serving


  1. Preheat the oven to 450 degrees Fahrenheit.
  2. Slice the mushrooms into 1/4” thick slices. Place them in a large bowl and mix with the olive oil, soy sauce, garlic, smoked paprika, onion powder, Worcestershire sauce, and kosher salt.
  3. Line a sheet pan with parchment paper and place the mushrooms in a single layer on top. Place it in the oven and roast for 15 minutes.
  4. Meanwhile, make the Horseradish Sauce. Toast the buns (if desired).
  5. When ready to assemble, place baby arugula on the buns and place strips of mushrooms on top. Add white onion slices, pickles, and horseradish sauce, and top with the bun.
  • Category: Main dish
  • Method: Roasted
  • Cuisine: Sandwich
  • Diet: Vegetarian