Slice the chicken breast into thin, bite-sized strips and place them in a small bowl.
Toss the chicken with chili powder, cumin, garlic powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a non-stick skillet over medium-high heat.
Add the chicken to the skillet and sear for 5-7 minutes, stirring occasionally, until the edges are golden and the meat is cooked through.
Turn off the heat and drizzle the fresh lime juice over the chicken, tossing to incorporate the pan juices.
Warm the corn tortillas in a separate dry pan for 30 seconds per side until soft and pliable.
Spread the mashed avocado onto the warm tortillas, then layer with the spiced chicken and shredded cabbage.
Garnish with fresh cilantro and a drizzle of salsa verde before serving.