Preheat your oven to 400°F (200°C). Line a large sheet pan with parchment paper for easy cleanup.
In a small mixing bowl, whisk together the olive oil, chili powder, ground cumin, garlic powder, salt, and black pepper until well combined.
Place the chicken breasts on the lined sheet pan and generously brush the marinade over each breast, ensuring they are evenly coated on all sides.
Bake the marinated chicken in your preheated oven for 15 minutes.
Carefully remove the sheet pan from the oven. Surround the chicken by sprinkling the tortilla chips liberally around them.
Generously layer the cheese over the chicken, followed by the black beans and halved cherry tomatoes. If you enjoy heat, add the sliced jalapeños on top of the chicken.
Return the sheet pan to the oven and continue baking for an additional 10-12 minutes, or until the chicken is fully cooked and the cheese looks melted and bubbly.
Once the baking time is complete, take the sheet pan out of the oven and allow it to rest for about 5 minutes.
Before serving, top the dish with the diced avocado and a sprinkle of fresh cilantro.
Serve the nacho chicken warm, accompanied by sour cream and salsa on the side for dipping.
Notes
Serve directly on the sheet pan for a casual look, or transfer to a platter.