Dice the chicken breast into small, uniform bite-sized pieces.
In a small bowl, whisk together the fresh lime juice, chili powder, ground cumin, garlic powder, sea salt, and black pepper to create a marinade.
Heat the olive oil in a non-stick skillet over medium-high heat until shimmering.
Add the diced chicken to the skillet and sauté for 5-6 minutes, stirring occasionally, until the meat is golden brown and cooked through.
Pour the lime-spice mixture over the chicken in the pan and toss for 1 minute until the sauce reduces and creates a flavorful glaze.
Preheat your oven broiler to high and line a small baking sheet with parchment paper.
Spread the corn tortilla chips in a single layer on the baking sheet.
Evenly distribute the seasoned chicken and rinsed black beans over the chips, then sprinkle with the shredded sharp cheddar cheese.
Place under the broiler for 2-3 minutes, watching closely, until the cheese is melted and bubbly.
Remove from the oven and garnish with fresh pico de gallo and diced avocado before serving immediately.