Slice the smoked sausage into bite-sized pieces.
In a large skillet, heat a tablespoon of oil over medium heat and add the sausage.
Add the onion and green bell pepper; cook until softened, about 5 minutes.
Stir in the garlic and cook for an additional minute until fragrant.
Pour in the diced tomatoes with their juices, rice, Cajun seasoning, and chicken broth; mix well.
Bring the mixture to a boil, then reduce the heat to low and cover.
Allow it to simmer for about 20 minutes, or until the rice is tender and the liquid is absorbed.
Remove from heat; let it sit covered for 5 minutes before fluffing with a fork.
Garnish with sliced green onions before serving.