Knishes
INGREDIENTS
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5 pounds Russet (baking) potatoes
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1/3 cup vegetable oil, or rendered chicken fat for an old-time deli taste
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6 cups coarsely chopped onions (about 2 pounds)
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4 teaspoons salt, or more to taste (divided)
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½ teaspoon freshly ground black pepper, or more to taste
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½ cup hot tap water
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½ cup canola, peanut, or other vegetable oil
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2 eggs
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1 teaspoon salt
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¼ teaspoon freshly ground black pepper
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3½ cups all-purpose flour (divided)
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1 teaspoon baking powder
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1 egg, well beaten
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