Heat the olive oil in a large, deep skillet or Dutch oven over medium-high heat. Add the sliced smoked sausage and cook until lightly browned, about 3 to 4 minutes. Remove the sausage with a slotted spoon and set it aside.
Add the chopped onion and bell pepper to the same skillet. Cook, stirring occasionally, until the vegetables soften, about 5 minutes.
Stir in the minced garlic and cook for 1 minute until fragrant.
Pour in the diced tomatoes (with their juice), chicken broth, uncooked rice, Cajun seasoning, oregano, and black pepper. Stir everything together well.
Bring the mixture to a boil. Once boiling, reduce the heat to low, cover the skillet tightly, and simmer for 15 to 20 minutes, or until the rice is tender and the liquid is absorbed. Do not lift the lid during this time.
Remove the skillet from the heat. Stir in the reserved smoked sausage.
Sprinkle the cheddar cheese and Monterey Jack cheese evenly over the top of the rice mixture. Cover the skillet again and let it sit for 5 minutes to allow the cheese to melt completely.
Fluff the rice gently with a fork, stir in the melted cheese, and garnish with fresh parsley before serving this easy sausage and rice skillet.
Notes
For a spicier kick, add 1/4 teaspoon of cayenne pepper along with the other seasonings.
You can substitute smoked sausage with kielbasa or your favorite ground sausage for a different flavor profile.
If you do not have chicken broth, you can use water, but the broth adds more depth to this one pot dinner idea.