Dice the chicken breast into small, bite-sized pieces and slice the onion and bell pepper into thin strips.
In a small bowl, toss the chicken with the adobo sauce, garlic powder, smoked paprika, sea salt, and black pepper until well coated.
Heat the avocado oil in a large skillet over medium-high heat.
Add the onions and bell peppers to the skillet and sauté for 4-5 minutes until they are softened and slightly charred.
Remove the vegetables from the skillet and set aside; add the seasoned chicken to the same skillet and cook for 6-8 minutes until fully cooked through.
Wipe the skillet clean and place one tortilla in the pan over medium heat.
Layer half of the cheese, the cooked chicken, the sautéed vegetables, and the remaining cheese onto one half of the tortilla, then fold it over.
Cook for 2-3 minutes per side until the tortilla is golden brown and the cheese is completely melted.
Repeat with the second tortilla and remaining ingredients, then slice into wedges and serve.