Name: The Best Grilled Portobello Mushroom Burger
Prep time: 30 min
Cook time: 30 min
Total time: 60 min
Yield: 4 servings
Ingredients: 4 portobello mushroom caps; 2 tbsp balsamic vinegar; 1 tbsp low sodium soy sauce; 1 tablespoons olive oil; 1 tbsp chopped rosemary; 1-1/2 tsp steak seasoning like Montreal Steak Grill Mates; 4 thick slices red onion; 4 oz reduced fat Swiss (sliced thin (Alpine lace)); 4 thin slices tomato; 1/2 avocado (sliced thin); baby spinach; 4 whole wheat low calorie buns (I used Martin)