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1
Heat 1/4 cup oil in a wide 6-quart heavy pot over moderately low heat until hot but not smoking, then add
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2
and cook, stirring frequently and turning over, until golden brown (nests will break up), 10 to 15 minutes. Transfer pasta with a slotted spoon to a bowl.
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3
Add 2/3 cup onion and 1 teaspoon garlic to oil remaining in pot and cook, stirring occasionally, until softened, 4 to 5 minutes, then stir in tomatoes with juice, 1/2 teaspoon salt, and sugar. Increase heat to moderately high and simmer, stirring frequently, until tomatoes have broken down into a very thick paste, about 25 minutes.
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4
While
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5
simmers, cook chorizo, bay leaf, and remaining 2/3 cup onion and 1 teaspoon garlic in remaining 2 tablespoons oil in an 8-quart heavy pot over moderate heat, stirring occasionally, until onion is softened, 4 to 5 minutes. Add wine and bring to a boil, then boil 5 minutes. Add stock and remaining 1/2 teaspoon salt and return to a boil, then add mussels. Cook, tightly covered, over moderate heat, until mussels open wide, 3 to 6 minutes. (Discard any mussels that remain unopened after 6 minutes.) Transfer mussels with a slotted spoon to a bowl. Discard bay leaf.
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6
Add mussel-cooking liquid and browned
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7
to
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8
and boil, uncovered, stirring frequently, until pasta is tender and has absorbed most of liquid, 12 to 15 minutes. Add mussels and 1 tablespoon parsley and cook, tossing, until mussels are heated through, 1 to 2 minutes. Serve sprinkled with remaining tablespoon parsley.
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9
*Available at some supermarkets and tienda.com (888-472-1022).
