"Learn to make authentic pierogi, the Polish dumplings filled with creamy potatoes and cheese, then topped with caramelized onions...."
INGREDIENTS
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4 cups all-purpose flour, spooned into measuring cup and leveled-off, plus more for kneading and rolling
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1 teaspoon salt
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1 cup room temperature water
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2 large eggs
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3 tablespoons unsalted butter
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3 medium yellow onions (1½ pounds), finely diced
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Salt and freshly ground black pepper
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1 cup mashed waxy potatoes, from 1 lb of yellow potatoes (see note)
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1 cup cottage cheese
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Vegetable oil (to prevent sticking)
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Unsalted butter
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Fresh parsley or dill
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Sour cream