Slice the chicken breast into thin strips and toss in a small bowl with sea salt, black pepper, cumin, and chili powder.
Finely dice the red bell pepper and yellow onion.
Heat the olive oil in a non-stick skillet over medium-high heat.
Add the chicken to the skillet and sauté for 5-6 minutes until cooked through and slightly golden.
Remove the chicken from the pan and briefly sauté the peppers and onions until they are tender-crisp.
Wipe the skillet clean and place the whole wheat tortilla in the pan over medium heat.
Sprinkle half of the cheddar cheese on one half of the tortilla, then layer on the chicken and sautéed vegetables.
Top with the remaining cheese and fold the tortilla in half.
Cook for 2-3 minutes per side until the tortilla is golden brown and the cheese is completely melted.
Slice into wedges and serve immediately.