Portobello Burger

Preparation time 30 min
Cooking time 15 min
This recipe keeps for 2 days

Ingredients (4 servings)

Caramelized onions

  • 1 large Red onion (sliced into rings)
  • 1/2 tbsp Grapeseed oil
  • 1 dash Salt


  • 4 piece Portobello mushrooms, raw
  • 3 tbsp Olive oil
  • 3 tbsp Balsamic vinegar
  • 1 tsp, ground Oregano, dried
  • 1 tsp, ground Basil, dried
  • 2 clove Garlic, raw
  • 1/2 tsp Salt


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  1. Clean the mushrooms
    To clean the mushrooms, use a paper towel to wipe away any dirt and remove the steams. Place steam side down, directly in the skillet.
  2. Marinate the mushrooms
    In a mixing bowl, combine the olive oil, balsamic vinegar, italian seasoning (basil + oregano), garlic and salt. Brush the marinade over the mushrooms. Flip the mushrooms over and brush the other side. Set aside, steam side up, uncovered, at room temperature. Marinate at least 30 minutes.
  3. Caramelize the onions
    To caramelize onions, heat a small skillet over medium-high heat. Once hot, add the oil, sliced onions and a pinch of salt. Sauté, stirring frequently, until golden brown and very soft. Set aside.
  4. Sauté the mushrooms
    Sauté the mushrooms, for about 3 - 6 minutes on each side. The mushrooms should end up deep golden brown.
  5. Build your burger
    To serve, add a generous spoonful of garlic aioli to each base bun, followed by tomatoes, greens and mushrooms. Spread aioli onto the top bun and put the lid on the burger. Enjoy!
  6. How to store
    Store leftover mushrooms separately in the refrigerator up to 2 days, though best served fresh.

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One serving contains 167 calories, 4 grams of protein, 12 grams of fat, and 12 grams of carbohydrates.

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Written by

Andreea Matei

Hi, I'm Andreea Matei, one of the founders. Calling me a foodie would be an understatement. I wholeheartedly embrace life through the realm of taste. My kitchen experiments are my superpower. For me, amazing food encompasses three dimensions: it must be crazy delicious, nutritious, and mindful of our animal friends and beautiful planet.