INGREDIENTS
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2 dozen fresh, precooked potato pierogi (see Note)
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Olive oil
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1 cup chopped tomato
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1/4 small red onion, thinly sliced
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1 medium jalapeño, seeded and thinly sliced
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Salt and freshly ground pepper
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1 pound large shiitake mushrooms, stems discarded
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1/4 cup thinly sliced scallions
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1 cup sour cream