INGREDIENTS
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2 tablespoons butter
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1 onion, halved and sliced into thin half moons
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2 garlic cloves, finely minced
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1/4 teaspoon dried oregano
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2 tablespoons A-1 steak sauce
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1 pound deli roast beef, cut into 2-inch strips
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Salt and pepper
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4 (6-inch) sub rolls, split partially open lengthwise
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8 slices provolone cheese