INGREDIENTS
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1/4 cup finely crushed corn cereal (such as Corn Flakes)
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1 tablespoon chopped fresh flat-leaf parsley
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1 large egg, lightly beaten
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1/2 tablespoon olive oil
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1 tablespoon ketchup, plus more for serving
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2 tablespoons grated Romano cheese
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1/4 teaspoon kosher salt
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1/4 teaspoon freshly ground black pepper
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8 ounces 96-percent lean ground beef
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Twelve 2 1/2-inch diameter sweet dinner rolls, halved, such as King's Hawaiian