Dice the chicken breast into bite-sized half-inch pieces.
In a small bowl, combine chipotle powder, cumin, garlic powder, sea salt, and black pepper.
Toss the chicken pieces in the spice blend until evenly coated.
Heat the olive oil in a non-stick skillet over medium-high heat.
Add the chicken to the skillet and cook for 5-6 minutes until browned and cooked through.
Stir in the black beans and cook for another 2 minutes until heated through.
Warm the corn tortillas in a dry pan or over an open flame for 30 seconds per side.
Divide the chicken and bean mixture between the tortillas.
Top with finely diced red onion and chopped fresh cilantro.
Serve immediately with a fresh squeeze of lime juice.