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1
Toast guajillo, ancho, and chipotle chiles in a dry pan over medium heat for 60 seconds until fragrant; rehydrate in 500 ml hot water for 15 minutes.
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2
Blend rehydrated chiles with garlic, onion half, oregano, cumin, vinegar, and fish sauce until completely smooth; pass through fine sieve.
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3
Sear beef pieces in a large pot over high heat until deep brown on all sides (8–10 minutes), working in batches; reserve.
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4
Deglaze pot with 200 ml beef stock, scraping fond; return beef, add chile paste, remaining stock, bay leaves, and pepper; bring to boil, then reduce to 85°C and braise covered for 2.5 hours until meat shreds easily.
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5
Strain consommé through cheesecloth into clean pot; skim fat; reduce over medium heat to 1.2 liters (30 minutes).
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6
Char tortillas directly over flame or on cast iron until pliable; dip each briefly into simmering consommé.
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7
Shred beef finely, divide among tortillas, roll tightly, and serve with 90 ml consommé per person alongside diced onion, cilantro, and lime wedge for squeezing.