Season the chicken breast evenly with cumin, chili powder, garlic powder, sea salt, and black pepper.
Heat the extra virgin olive oil in a medium skillet over medium-high heat.
Add the chicken to the skillet and cook for 5-7 minutes per side until golden brown and cooked through.
Remove the chicken from the pan, let it rest for a few minutes, then slice or shred it into bite-sized pieces.
In the same skillet, briefly warm the black beans until heated through.
Warm the whole wheat tortilla in a dry pan or microwave until soft and pliable.
Assemble the burrito by layering the baby spinach, warm chicken, black beans, avocado slices, and fresh salsa in the center.
Fold the sides of the tortilla inward and roll tightly to secure the filling.