INGREDIENTS
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2 medium onions, thinly sliced
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2 celery ribs, thinly sliced
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2 garlic cloves, pressed
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1 (2- to 3-lb.) beef brisket
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2 teaspoons salt
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1 1/2 teaspoons ground chipotle powder
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1 cup coarsely chopped fresh cilantro
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Flour tortillas
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Toppings: shredded Mexican cheese blend, sour cream, salsa, chopped fresh cilantro
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Lime wedges