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Grilled Portobello with Basil Mayonnaise Sandwich

By: Rotorwife

"A light vegetarian sandwich with great flavor that is perfect for summer. You can use just about any type of bread but Kaiser rolls or burger buns are best. I like to serve this with grilled squash and a glass of white wine!"

Rate/Review | Read Reviews (50)

Prep Time:
10 Min

Cook Time:
10 Min

Ready In:
25 Min

Servings (Help)

US Metric Calculate

Original Recipe Yield 6 sandwiches

Ingredients

1/3 cup balsamic vinegar
1/4 cup olive oil
1 tablespoon minced garlic
6 portobello mushroom caps
1/2 cup mayonnaise
1 tablespoon Dijon mustard
1 teaspoon lemon juice
2 tablespoons chopped fresh basil
6 kaiser rolls, split, toasted
1 tablespoon butter
6 leaves lettuce
6 tomato slices

Directions

Preheat an outdoor grill for medium heat, and lightly oil the grate. Whisk together the balsamic vinegar, olive oil, and garlic in a small bowl.
Arrange the portobello mushrooms gill-side up on a tray or baking sheet. Brush the mushrooms with some of the vinegar mixture, and allow to marinate for 3 to 5 minutes.
Place the marinated mushrooms on the preheated grill, gill-side down. Grill mushrooms until tender, brushing both sides of the mushrooms with the remaining marinade, about 4 minutes on each side.
Mix the mayonnaise, dijon mustard, lemon juice, and basil in a small bowl. Butter the toasted kaiser rolls, then spread with the mayonnaise mixture. Divide the mushrooms, lettuce, and tomato slices evenly to make 6 sandwiches.