In a bowl, toss the diced chicken with Cajun seasoning and olive oil until well coated. Let it marinate for about 15 minutes.
In a large skillet over medium heat, add the marinated chicken. Cook for about 5-7 minutes until the chicken is cooked through and golden brown. Remove and set aside.
In the same skillet, add sliced red bell peppers and onions. Sauté for about 4-5 minutes until they are soft and slightly charred.
In a separate pan, warm the flour tortillas over medium heat for about 30 seconds on each side until they are soft and pliable.
On each tortilla, layer the cooked chicken, sautéed peppers and onions, sliced avocado, and shredded cabbage.
Sprinkle fresh cilantro on top and add a dollop of sour cream or Greek yogurt for creaminess.
Squeeze fresh lime juice over the tacos for an extra zing.