INGREDIENTS
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1 pound shell, sirloin, or rib steak, well trimmed and boneless
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About 1/4 cup extra virgin olive oil
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1 Vidalia or other sweet onion, halved and thinly sliced
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Fine sea salt
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Freshly ground black pepper
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4 to 6 Italian frying peppers, halved and stemmed, seeds discarded
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4 soft hero breads or hoagie rolls, halved lengthwise
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Balsamic vinegar
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1/4 pound imported or sharp, aged provolone cheese, thinly sliced