Ingredients
Scale
- 4 portobello mushroom caps
- 2 tbsp balsamic vinegar
- 1 tbsp low sodium soy sauce
- 1 tbsp olive oil
- 1 tbsp chopped rosemary
- 1–1/2 tsp steak seasoning (like Montreal Steak Grill Mates)
- 4 oz reduced fat Swiss cheese (sliced thin)
- Whole wheat low-calorie buns
Instructions
- Prepare the marinade by whisking together balsamic vinegar, soy sauce, olive oil, rosemary, and steak seasoning in a large bowl.
- Add portobello mushroom caps to the marinade, tossing to coat evenly. Let them marinate at room temperature for 20-30 minutes.
- Preheat your grill or indoor grill pan over medium heat and brush with oil to prevent sticking.
- Grill the marinated mushrooms for about 5-7 minutes per side, basting with reserved marinade until tender.
- During the last minute of grilling, place a slice of Swiss cheese on each mushroom cap to melt.
- Toast whole wheat buns until golden brown and assemble by layering baby spinach, grilled mushrooms, onions, tomatoes, and avocado on each bun.
- Prep Time: 30 minutes
- Cook Time: 15 minutes
- Category: Main
- Method: Grilling
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 330
- Sugar: 3g
- Sodium: 470mg
- Fat: 12g
- Saturated Fat: 5g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 39g
- Fiber: 8g
- Protein: 18g
- Cholesterol: 15mg