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season chicken with cumin, chili powder, and salt and pepper.
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heat oil in a 12-inch cast-iron skillet over medium-high heat.
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add chicken and cook, stirring occasionally, until cooked through, 5 to 7 minutes.
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remove to a plate; reserve skillet.
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add pepper, onion and garlic to skillet and cook, stirring occasionally, until soft, 4 to 6 minutes.
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stir in chipotles, lime juice, and chicken.
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cook stirring until warm.
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season with salt and pepper.
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serve chicken and vegetables with tortillas and toppings.