Pat the chicken breast dry with a paper towel, then dice into small, uniform cubes for even cooking.
In a small bowl, combine the cumin, garlic powder, sea salt, and black pepper, then toss the chicken in the spice blend until thoroughly coated.
Heat the avocado oil in a large non-stick skillet over medium-high heat.
Add the seasoned chicken to the skillet and sauté for 6-8 minutes, stirring occasionally, until the edges are golden-brown and the centers are opaque.
Reduce the heat to medium and stir in the black beans and chipotle in adobo sauce, cooking for 2-3 minutes to allow the smoky flavors to penetrate the protein.
While the chicken rests, whisk the lime juice in a medium bowl and toss with the shredded red cabbage and chopped cilantro to create a bright, crunchy slaw.
Warm the corn tortillas in a clean, dry skillet for 30 seconds per side until soft and pliable.
Divide the smoky chicken and bean mixture between the tortillas, then top each with a generous portion of cabbage slaw and slices of fresh avocado.