Savory Portobello Mushroom Burgers

Ingredients

• 2 tablespoons balsamic vinegar 
• 1 tablespoon dijon mustard 
• 2 cloves garlic minced
• 1 pinch salt and ground pepper black
• 2 tablespoons olive oil 
• 4 large portabello mushrooms 
• 4  kaiser rolls split

Equipment

• bowl
• whisk
• grill

Directions

1. Preheat grill for medium-high heat and lightly oil the grate.
2. Whisk olive oil, balsamic vinegar, Dijon mustard, garlic, Worcestershire sauce, salt, and pepper in a bowl.
3. Brush the mixture over the tops and bottoms of the mushrooms; let stand for 10 minutes.
4. Grill mushrooms on the preheated grill with the cover closed until mushrooms are browned and tender, about 10 minutes, turning once.
5. Serve on kaiser rolls.