Portabello Mushroom and Basil Burgers

When Portabello Mushrooms take center stage - you know this Vegetarian "Burger" is going to be GOOD!


  • ½ cup mayonnaise
  • ¼ cup chopped fresh basil
  • 1 tablespoon Dijon mustard
  • 1 teaspoon fresh lemon juice
  • ⅓ cup olive oil
  • 1 tablespoon minced garlic
  • 4 Portobello mushrooms, stems removed
  • (4) 3 ½ to 4-inch diameter-whole-grain hamburger buns
  • 4 large romaine lettuce leaves
  • 4 large tomato slices


  • Mix first 4 ingredients (mayo, basil, Dijon, lemon juice) in small bowl. Season with salt and pepper. Whisk olive oil and garlic in another small bowl.
  • Prepare grill on medium-high heat.
  • Brush mushroom caps on both sides with garlic oil. Season with salt and pepper. Grill mushrooms until tender and golden brown, about 4 minutes per side. Transfer to platter; cover with foil to keep warm.
  • Grill cut side of hamburger buns until light golden, about 2 minutes. Place bottom half of hamburger bun on each plate.
  • Top each with 1 mushroom, then 1 lettuce leaf and 1 tomato slice. Spoon some basil-mustard sauce over the tomato and top with the bun.

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