Heat the oil in your large skillet over medium-high heat. Once hot, add the sliced sausage and cook for about 2-3 minutes until it starts to brown. Those caramelized edges are pure flavor bombs, so don't rush this step.
Add the onion and bell peppers to the skillet with the sausage. Cook for another 3-4 minutes until they start to soften. Your kitchen should be smelling amazing right about now.
Toss in the garlic and cook for 30 seconds until fragrant. Any longer and it might burn, which would be a tragedy of Shakespearean proportions.
Add the rice to the skillet and stir for about a minute, coating it with all those delicious oils and flavors. This step might seem minor, but it adds a ton of depth to the finished dish.
Pour in the chicken broth and diced tomatoes (with their juice). Add the Cajun seasoning and bay leaf, then give everything a good stir.
Bring to a boil, then reduce heat to low, cover, and simmer for about 15 minutes, or until the rice is tender and most of the liquid has been absorbed.
Remove from heat and let it sit, covered, for 5 more minutes. This allows the rice to finish steaming and the flavors to meld together.
Fluff with a fork, remove the bay leaf, and garnish with sliced green onions before serving. Pass the hot sauce at the table for those who like to live dangerously.