Avocado Club Sandwich with Marinated Portobello Mushrooms

Meat lovers everywhere will love this vegan sandwich. Portobello mushrooms are thinly sliced and marinated in a savory bold dressing for hours so they soak up the rich flavor. The result is eerily similar to sliced roast beef, and incredible! The creamy avocado serves as a play on mayonnaise, binding all the ingredients together and creating a nice balance of texture and flavors. Try adding a layer of peppery tempeh in this sandwich and prepare to have your taste buds blown.
Photography By Katie Newburn | August 29, 2016


  1. Using a mandolin or a knife, thinly slice (less than ¼ inch) the Portobello mushrooms. In a deep baking dish, combine the vinegar, oil, tamari, maple syrup, garlic, thyme, rosemary, and a pinch of salt. Whisk to combine.
  2. Gently arrange the mushroom slices flat in the baking dish to absorb the marinade. Cover and store in the refrigerator for 2 hours, remove, and stir, flipping the mushrooms over to ensure all the liquid is being evenly absorbed, then re-cover and refrigerate for at least 8 hours. The mushrooms may be stored in an airtight glass container in the refrigerator for up to 5 days.
  3. To serve, mash ¼ to ½ avocado on each bread slice, add a pinch of salt, then evenly layer on the marinated mushrooms. Top with desired garnishes.


Nutrition Tip: Portobello mushrooms contain B vitamins, copper, potassium, phosphorus,selenium, and antioxidants galore. They are particularly great for plant-based diets, adding a hearty or meaty component to the meal. 


From NUTRITION STRIPPED by McKel Hill, MS, RDN. Copyright © 2016 by McKel Hill.
Reprinted by permission of William Morrow, an imprint of HarperCollinsPublishers.

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  • 4 portobello mushroom caps
  • ¼ cup balsamic vinegar
  • 2 tablespoons olive oil
  • 2 tablespoons tamari or nama shoyu
  • 1 tablespoon pure maple syrup
  • 2 cloves garlic, minced
  • 1 tablespoon chopped fresh thyme
  • 1 tablespoon finely chopped fresh rosemary
  • Sea salt
  • 1 avocado
  • 2 slices Artisan Seeded Bread (page 134)
  • Garnishes: sliced heirloom tomato, sliced radishes, butter leaf lettuce or arugula, Dijon mustard, pea shoots or sprouts, sea salt, freshly ground black pepper
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