Savory Portobello Mushroom Burgers

Ingredients

• 2 tablespoons olive oil
• 2 tablespoons balsamic vinegar
• 1 tablespoon Dijon mustard
• 2 cloves garlic, minced
• 1/2 teaspoon Worcestershire sauce (optional)
• 1 pinch salt and ground black pepper
• 4 large portobello mushrooms, stems removed
• 4 kaiser rolls, split

Directions

Preheat grill for medium-high heat and lightly oil the grate.

Whisk olive oil, balsamic vinegar, Dijon mustard, garlic, Worcestershire sauce, salt, and pepper in a bowl. Brush the mixture over the tops and bottoms of the mushrooms; let stand for 10 minutes.

Grill mushrooms on the preheated grill with the cover closed until mushrooms are browned and tender, about 10 minutes, turning once. Serve on kaiser rolls.