INGREDIENTS
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4 portobello mushroom caps
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2 tbsp balsamic vinegar
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1 tbsp low sodium soy sauce
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1 tablespoons olive oil
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1 tbsp chopped rosemary
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1-1/2 tsp steak seasoning like Montreal Steak Grill Mates
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4 thick slices red onion
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4 oz reduced fat Swiss, sliced thin (Alpine lace)
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4 thin slices tomato
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1/2 avocado, sliced thin
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baby spinach
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4 whole wheat low calorie buns (I used Martin)
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