Heat a skillet over medium high heat and add the andouille sausage. Cook until browned and caramelized on the edges, about 3-5 minutes. Remove and set aside.
Turn the heat to medium and add the butter, onion, garlic and green pepper. Sauté for 1-2 minutes.
Add the tomato paste and mix in. Cook another 1-2 minutes, stirring regularly to ensure the tomato paste doesn't burn.
Add the chicken stock, Cajun seasoning and sausage and bring to a boil.
Add the rice and stir to mix everything together. Turn the heat to low, cover, and simmer for 18-20 minutes. Turn off the heat and let sit for 10 minutes.
Fluff and serve garnished with diced green onions and Louisiana hot sauce.
Notes
Don't skip the 10 minute rest period at the end - let it rest for the full amount. This allows the rice to finish cooking properly.
Leave the lid on while the rice cooks - no peeking! This ensures the rice is cooked properly.
Make sure to rinse your rice well first to remove any excess starch. If his rice is not rinsed thoroughly, it can become sticky or gummy when cooked.
Use a timer when cooking the rice - it is easy to forget about it if you get distracted with something else while it simmers!