Dice the bell peppers, onions and celery. Make sure all of them are uniform (same size).
Heat oil in a large skillet over medium heat. Once the oil is warm, add in the chopped peppers, onion, and celery. Cook for 4-5 minutes until soft & fragrant.
While the veggies are cooking, slice the kielbasa into even discs.
Add the sliced kielbasa to the skillet and cook for an additional 3 minutes.
Add in the minced garlic and cook for 30 seconds.
Stir the tomato paste in and cook for 1 minute, stirring constantly.
Stir the chicken broth into the skillet and bring to a simmer. Stir in the rice.
Cover and cook for 5 minutes, stirring occasionally.
Remove from the heat, stir in the cajun seasoning and top with parsley.