In a small bowl, whisk the kosher salt, black pepper, cumin and chili pepper together. Use ¼ teaspoon if you like things a bit spicier. You’ll have extra seasoning left over for the black beans.
Sprinkle the spice mix over both sides of the chicken breasts. Place the chicken in between plastic wrap and gently pound the chicken to an even thickness.
Let the chicken rest for about 20 minutes to take the chill off. You can also refrigerate for an hour or even overnight. When you’re ready, just let the chicken come to room temperature for about 20 to 30 minutes.
Heat the olive oil in a skillet over medium heat. Pan sear the chicken, lightly browning on both sides, about 3 to 4 minutes on each side.
Finish in a 350-degree oven for 5 minutes. Transfer the chicken to a cutting board and cover with foil, letting the chicken rest for 10 minutes.
While the chicken is cooking, add ¼ teaspoon of the seasoning, or to taste, to the black beans. Warm over medium heat.
To assemble:
Tear out four sheets of aluminum foil. Slice the chicken into thin strips.
Lay out a tortilla and spread ¼ cup of the cheese in a line just to the left of the center.
Top with about 2 tablespoons of the warm black beans, drained.
Layer the sliced chicken on top. Fold the bottom up the tortillas up, then wrap the left side over the cheese, beans and chicken, tucking and rolling.
Wrap up in a sheet of foil and place on a baking sheet. Repeat with the remaining tortillas. At this point you can refrigerate or bake. (If chilled, let the burritos rest at room temp for about 10 minutes before baking.)
Bake in a 350-degree oven for 15 minutes, until heated throughout and the cheese has melted.
Serve with sour cream, salsa and perhaps an extra side of black beans.