Combine salt, garlic powder, cumin, paprika, and allspice in a small bowl. Rub spice mixture evenly over pork. Heat a large cast-iron skillet over medium-high heat. Add oil to pan; swirl to coat. Add pork to pan; cook 3 minutes on each side or until done. Remove pork from pan; let stand 5 minutes. Cut across the grain into thin slices.
Return pan to medium-high heat. Add onion and bell pepper to pan; sauté 5 minutes or until lightly charred. Remove onion mixture from pan.
Warm tortillas according to package directions. Top tortillas evenly with pork, onion mixture, mango, and cilantro. Serve tacos with lime wedges.
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wow! i made this a few weeks ago when the january issue arrived. i'm making it again tonight. it's not too time consuming to make and is incredibly tasty. this is a dish worth adding to the repertoire!