Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Pat the chicken thighs dry with a paper towel and place them in a small mixing bowl.
Toss the chicken with olive oil, chili powder, cumin, garlic powder, sea salt, and black pepper until evenly coated.
Arrange the chicken on the prepared baking sheet and bake for 20 to 25 minutes, or until the internal temperature reaches 165°F.
While the chicken is roasting, wash and chop the romaine lettuce, bell pepper, and red onion.
Rinse and drain the black beans thoroughly.
Once the chicken is cooked, let it rest for 5 minutes before slicing into thin strips.
In a large salad bowl, combine the romaine, peppers, onions, and black beans.
Place the sliced chicken on top of the vegetables.
Finish the salad with sliced avocado, fresh cilantro, and a generous squeeze of lime juice as a natural dressing.