Add the oil to the stockpot and heat on medium heat.
Season the chopped chicken with salt and pepper and 1/2 the Cajun seasoning. Add to the oil and cook until browned. The chicken should have an internal temperature of 165 degrees. (this will take about 6-8 minutes)
Rince the rice and cook it in 1 1/3 cups water until it is fluffy and tender. (follow the package directions to cook the rice)
Add the prepared vegetables to the Dutch oven with the chicken. Add more oil if needed.
Cook until the onions are translucent and the veggies are soft. This will take about 6 minutes.
Stir in the tomato paste. Cook for 2 minutes, until dark brown.
Add the chicken broth and cooked rice.
Bring the mixture to a bowl, then turn off the heat. Serve.