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1
Mix together pork, crabmeat, beaten whole egg, cilantro, ginger, scallion, garlic, and salt in a bowl until combined well.
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2
Line a tray with wax paper.
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3
Put a double thickness of paper towels on a work surface and fill a shallow baking pan with warm water.
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4
Discard any rice-paper wedges with holes. Soak 1 wedge in warm water until pliable, 30 seconds to 1 minute, then carefully transfer to paper towels, arranging it with curved side of wedge nearest you.
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5
Put 1 tablespoon filling in middle of curved side about 1/2 inch from edge and shape filling horizontally into a 2 3/4-inch log. Fold left and right corners of wedge over filling, overlapping slightly and aligning bottom edges. (Wedge will resemble an open envelope.).
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6
Dab top corner with some yolk, then tightly roll up wedge away from you, making sure ends stay tucked inside. (Be sure to roll up wedges tightly or air pockets will prevent rolls from browning evenly when fried.) Put roll, seam side down, on tray and loosely cover with plastic wrap. Make more rolls in same manner, transferring to tray and arranging 1/2 inch apart. Keep loosely covered until ready to fry.
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7
Heat about 1 inch of oil in a 5- to 6-quart pot over moderately high heat until it registers 365u00b0F on thermometer. Fry rolls in batches of 5 or 6, keeping rolls apart during first minute of frying to prevent sticking and stirring occasionally, until golden brown and cooked through, 5 to 6 minutes. Transfer as fried with a slotted spoon to paper towels to drain.
