In a bowl, season cubed chicken thighs with fajita seasoning, Carne Asada seasoning, garlic powder, onion powder, salt, pepper, and lemon juice. Toss to coat.
Heat 2 tbsp olive oil in a skillet over medium heat. Add the seasoned chicken and cook until almost cooked through.
Add sliced onion, red bell pepper, and orange bell peppers. Cook until the chicken is fully cooked and the vegetables are tender.
Heat a little oil in a skillet. Add a tortilla, sprinkle cheese over the whole tortilla, then spoon chicken and peppers onto one half. Fold the tortilla over.
Cook for 2–3 minutes per side until golden brown and the cheese is melted.
Slice and serve with salsa, sour cream, or guacamole.
