Great Tastes of Manitoba

Portabella Burger with Roasted Red Pepper Mayo

17 mins
Prep: 5 mins | Cook: 12 mins | Servings: 4


  • 4 large portabella mushroom caps, stems removed
  • 1 Tbsp (15 mL) canola oil
  • 1 Tbsp (15 mL) balsamic vinegar
  • 1 tsp (5 mL) Italian seasoning
  • Salt and freshly ground pepper
  • 1/2 cup (125 mL) grated Mozzarella cheese
  • 4 slices red onion
  • 4 kaiser rolls, halved
  • Mixed greens for topping

Red Pepper Mayo:

  • 2 Tbsp (25 mL) light mayonnaise
  • Juice of 1/2 lemon
  • 1/4 cup (50 mL) finely chopped roasted red peppers
  • 1 clove garlic, minced


  1. Place mushroom caps on cookie sheet. Using the tip of a sharp knife, lightly score the top of each mushroom cap on the diagonal in a criss cross pattern.
  2. In small bowl, combine oil, balsamic vinegar, Italian seasoning, salt and pepper. Brush over all sides of mushroom.
  3. Roast at 450°F/225°C for 10-12 minutes or until tender and cooked through.
  4. Arrange one mushroom on bottom of each roll.
  5. Top with cheese, onion slice and handful of mixed greens.
  6. Spread top of each roll with “Red Pepper Mayo”.
  7. Place top on mushroom. Serve immediately.

Red Pepper Mayo:

  1. In small bowl, combine mayonnaise, lemon juice, red peppers and garlic. Set aside.

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