Portobello Mushroom Sliders

Portobello sliders served on pretzel buns.

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.

Course Appetizer, Main Course

Cuisine American

Prep Time 15

Cook Time 15

Total Time 30

Servings sliders

Calories 34

Author Elizabeth

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
½ Teaspoon Kosher Salt
2-6 Tablespoons Vegetable Broth

WFPB Aioli

½ Cup Plant-Based Mayonnaise
4 Cloves Minced Garlic

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 ⅛" 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!

Notes

**Nutrition facts calculated without buns.

Nutrition