Begin by marinating the chicken. Rub the Cajun seasoning all over the chicken breasts and let them sit for about 15 minutes to absorb the flavors.
In a large skillet, heat the olive oil over medium heat. Add the seasoned chicken breasts and cook for about 6-7 minutes on each side, or until fully cooked and no longer pink in the center. Remove from heat and let the chicken rest for a few minutes before slicing it into strips.
While the chicken is resting, prepare the sauce by mixing the Greek yogurt (or sour cream) with lime juice, salt, and pepper in a small bowl. Stir until smooth.
To assemble the wraps, lay the tortillas flat on a clean surface. Start by spreading a generous spoonful of the yogurt sauce down the center of each tortilla.
Layer the shredded lettuce, diced tomato, red bell pepper, sliced red onion, and avocado evenly on top of the sauce.
Finally, add the sliced Cajun chicken on top of the vegetables.
Carefully fold the sides of each tortilla inwards, then roll them up tightly from the bottom to the top to create the wraps.
If desired, place the wrapped tortillas seam-side down on a skillet over medium heat for 1-2 minutes to toast and secure the wraps. This step is optional but adds a nice crispiness to the outsides.
Slice the wraps in half diagonally and serve immediately.