"A hearty sandwich that will appeal to vegetarians and meat-lovers alike. Portobello mushrooms have a deliciously meaty texture and are perfectly suited to the grill...."
INGREDIENTS
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1/3 cup olive oil
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2 tablespoons balsamic vinegar
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2 teaspoons McCormick® Grill Mates® Montreal Steak Seasoning
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4 large portobello mushroom caps
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8 slices Italian bread, sliced diagonally
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Garnishes such as green leaf lettuce, sliced roasted red peppers, sliced tomatoes and feta cheese (optional)