Grilled Portobello Burger
- 6 sourdough buns or rolls, split
- 6 large portobello mushroom caps
- ¼ cup mayonnaise
- ½ cup KIKKOMAN Roasted Garlic Teriyaki Marinade & Sauce
- 6 (1-ounce) part-skim mozzarella cheese slices
Combine mushroom caps and teriyaki sauce in a heavy-duty zip-top plastic bag, turning to coat; seal and let stand 20 minutes. Grill mushroom caps, covered with grill lid, over medium-high heat (350° to 400°) 2 minutes on each side. Top with cheese, and grill 2 minutes. Spread mayonnaise on cut si...