Savory Portobello Mushroom Burgers

Ingredients

• 2 tablespoons olive oil
• 2 tablespoons balsamic vinegar
• 1 tablespoon Dijon mustard
• 2 cloves garlic , minced
• 0.5 teaspoons Worcestershire sauce , Optional
• 1 pinch salt and ground black pepper
• 4 large portobello mushrooms , stems removed
• 4 kaisers rolls , split

Instructions

1. 1

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

2. 2

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

3. 3

   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.