Grilled Portobello with Basil Mayonnaise Sandwich

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!

• Preparation Time: 10 mins
• Cooking Time: 10 mins
• Total Time: 20 mins
• Calories: 412 Calories

Ingredients

• 1 tablespoon butter
• 1 teaspoon lemon juice
• ¼ cup olive oil
• ½ cup mayonnaise
• 2 tablespoons chopped fresh basil
• 1 tablespoon minced garlic
• ⅓ cup balsamic vinegar
• 6 leaves lettuce
• 1 tablespoon Dijon mustard
• 6 tomato slices
• 6 portobello mushroom caps
• 6 kaiser rolls, split, toasted

Recipe Instructions

Step 1

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.

Step 2

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.

Step 3

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.

Step 4

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.