"Where's the beef? No one will miss it with these delictable burgers. Serve on lightly toasted whole wheat rolls with grilled onions for a healthy lunch or dinner meal...."
INGREDIENTS
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4 large portabella mushrooms
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1/4 cup balsamic vinegar
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2 tablespoons olive oil
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1 teaspoon dried basil
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1 teaspoon dried oregano
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2 -4 cloves garlic, finely minced
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salt and pepper
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4 ounces sliced provolone cheese
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4 whole wheat rolls
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sliced tomato (optional)
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romaine lettuce leaf (optional)
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sliced grilled onion (optional)
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Dijon mustard (optional)