Heat olive oil in a large skillet over medium heat. Add the sliced Cajun sausage and cook until browned, about 5 minutes. Remove sausage from skillet and set aside.
In the same skillet, add diced onion, bell pepper, and minced garlic. Sauté for about 3-4 minutes until the vegetables are softened.
Stir in the long grain rice, allowing it to toast slightly for about 1-2 minutes.
Add the can of diced tomatoes (with juice), chicken broth, Cajun seasoning, paprika, black pepper, and salt. Bring the mixture to a boil.
Once boiling, reduce the heat to low, cover the skillet, and simmer for 15-20 minutes or until the rice is fully cooked and has absorbed most of the liquid.
During the last 5 minutes of cooking, stir in the frozen peas and add the browned sausage back into the skillet. Mix well and allow to heat through.
Remove from heat and let it sit for a few minutes before serving. Garnish with fresh parsley if desired.