Portobello Mushroom Sliders
Portobello Mushroom Sliders are a tasty vegetarian burger option for summer. The mushrooms are tossed with a smoky marinade and loaded with caramelized onions and vegan aioli. Serve on a vegan pretzel bun for an epic burger experience.
Author:
Elizabeth | At Elizabeth's Table
Serves:
6
Prep:
15
minutes
Cook:
15
minutes
TOtal:
30
minutes
Ingredients
Portobello Sliders
- 8 Ounces Portobello Mushrooms, stems removed
- 2 Tablespoons Soy Sauce, Tamari, or Liquid Aminos
- 1 Tablespoon Red Wine Vinegar
- 1 Tablespoon Maple Syrup
- 1 Tablespoon Dijon Mustard
- 1 Teaspoon Liquid Smoke
Sautéed Onion
- 1 Medium Yellow Onion, thinly sliced into rounds
- 1/2 Teaspoon Kosher Salt
- 2-6 Tablespoons Vegetable Broth
WFPB Aioli
To Serve
- 6 Vegan Slider Buns (I used pretzel buns)
- A few handfuls of Arugula OR 8 Butter Lettuce Leaves
Instructions
- Slice the portobello mushrooms into 1/8" thick strips. If your mushrooms are longer than your slider buns, slice the strips in half or thirds.
- In a large bowl, toss the sliced portobellos with the soy sauce, red wine vinegar, maple syrup, dijon mustard, and liquid smoke. Set aside to marinate 10-15 minutes while you prepare the onion and aioli.
- Meanwhile heat the onion and salt with 2 tablespoons of vegetable broth in a large non-stick pan over medium heat. Cook for 8-10 minutes, until the onion is soft. Add another few tablespoons of vegetable broth after a few minutes of cooking. Once the onion is reduced in size and very soft, remove from the pan and set aside.
- Make the aioli. In a small bowl mix together the mayonnaise and garlic. Set aside.
- Return to the mushrooms. Add the mushrooms and any marinade liquid to the non-stick pan. Cook over medium heat for 4-6 minutes, until the mushrooms are soft.
- Assemble the siders. Spread a schmear of aioli on the bottom bun, add a small handful of greens, top with the mushrooms, then onions, and an extra drizzle of aioli. Serve and enjoy!