Just brush large, thick portobello mushroom caps with an easy and flavorful dressing made with olive oil, balsamic vinegar, Dijon mustard, and garlic, and grill a few minutes until juicy and tender.

Just brush large, thick portobello mushroom caps with an easy and flavorful dressing made with olive oil, balsamic vinegar, Dijon mustard, and garlic, and grill a few minutes until juicy and tender.