First, make the marinade. To a blender or bowl of a small food processor, add the cinnamon, brown sugar, allspice, thyme, garlic, scallions, ginger, peppers, oil and lime juice. Puree until smooth. Transfer the marinade to a gallon-size, sealable bag. Add the chicken, press out any excess air from the bag, then seal and turn to coat. Marinate for at least 1 hour and up to 24 hours in the refrigerator. For the mango avocado salsa, combine the mango, avocado, onion, cilantro, lime zest, and lime juice in a bowl. Toss to combine. Season with salt, as needed. Preheat the grill to medium-high heat or set a grill pan over medium-high heat. If using a grill, clean the grill grates and brush them with oil. If using a grill pan, coat pan lightly with oil. Once hot, remove the chicken from the marinade and pat dry; discard marinade. Season with a little kosher salt. Grill the chicken, turning once, until internal temperature reaches 165°F, 10 to 14 minutes total. Remove from grill and let rest 5 minutes before slicing. Serve sliced chicken in warmed tortillas and top with mango avocado salsa.
Reprinted with permission from Taco! Taco! Taco!, Copyright 2018 by Sara Haas published by Hatherleigh Press.