INGREDIENTS
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1 16.9 ounce package frozen potato-and-onion-filled pierogi (potato dumplings)
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12 ounces green and/or wax beans, trimmed (3 cups)
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1 1 pound pork tenderloin
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Salt and ground black pepper
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2 tablespoons olive oil
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1/2 cup balsamic vinegar
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2 teaspoons chopped fresh rosemary (optional)