PORTOBELLO MUSHROOM BURGERS WITH BASIL-MUSTARD SAUCE

Portobello Mushroom Burgers with Basil-Mustard Sauce image

Provided by @MakeItYours

Number Of Ingredients 16

1 cup mayonnaise substitute:
(3 tbsp lemon juice
1/2 cup soy milk
1/4 tsp salt
1/4 tsp paprika
1/4 tsp mustard
6 tbsp vegetable oil)
1/3 cup shopped fresh basil
2 tablespoons Dijon mustard
1 teaspoon fresh lemon juice
1/3 cup olive oil
1 tablespoon minced garlic
6 4- to 5-inch-diameter portobello mushrooms, stems removed
6 3 1/2- to 4-inch-diameter whole-grain hamburger buns, split
6 large romaine lettuce leaves
6 large tomato slices (optional)

Steps:

Mix first "mayo" ingredients in small bowl.
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 tomato and top with bun. Pass remaining basil-mustard sauce separately.