In a large skillet over medium heat, add the ground chicken. Cook until browned, breaking it apart as it cooks, about 5-7 minutes. Drain any excess fat.
Stir in the chopped onions and green bell pepper, cooking until they soften—around 4-5 minutes. Add minced garlic and cook for an additional minute until fragrant.
Sprinkle in the Cajun seasoning, stirring well to coat the chicken and vegetables evenly. Cook for another 2-3 minutes to allow the flavors to meld.
Pour in the tomato sauce and Worcestershire sauce. Add the brown sugar, stirring until everything is well-combined. Let it simmer on low heat for 10 minutes.
While the mixture is simmering, lightly toast your buns for added texture and flavor.
Spoon the Cajun chicken mixture generously onto each bun. Top with your choice of garnishes like chopped cilantro or avocado, and serve immediately.
