SAUSAGE: Add 1 tbsp oil to a large stockpot or cast iron pot over medium heat. Add thinly sliced sausage in a single layer, and cook, stirring frequently until sausage is lightly browned, about 5-6 minutes. Use a slotted spoon to remove the sausage to a paper-towel-lined plate and tent with foil. Leave any grease behind; if there is an excess of 2 tablespoons drain off the surplus.
VEGGIES: Add 1-1/2 cups diced onion, 1 cup diced bell pepper and 1-1/3 cup diced celery to the pot. Cook, stirring occasionally, until tender and onion is translucent, about 7-10 minutes.
FLAVORING: Add in 2 tbsp. tomato paste, 1 tbsp. garlic, 1-1/2 tsps Cajun seasoning, 1 tsp paprika, 1/2 tsp oregano and salt & pepper to taste (I add 1/2 tsp salt & 1/4 tsp pepper). Stir until very fragrant, about 1-2 minutes.
SIMMER: Finally, add in 3 cans (drained and rinsed) red beans, 3 cups chicken stock, and 1 bay leaf. Return the sausage to the pot. Bring to a boil and then cover the pot with a lid; reduce heat to simmer for 15 minutes. Uncover the pot and continue to simmer for another 15 minutes.
PREPARE RICE: Meanwhile, prepare the rice. Here's how we do it: Fill a large pot with water and set it to boil. Once the water is at a rolling boil, salt the water and add in 1-1/4 cup uncooked rice. Cook without, reducing the heat, for 6 minutes (Taste test to ensure it is tender.) and then drain and fluff with a fork. Set aside for now. (See note 3.)
OPTIONAL MASH BEANS: After the dish has finished simmering, you can mash some of the beans. Two ways to do this: either use a wooden spoon to mash beans until slightly thickened or remove 1-1/2 cups of the beans and surrounding liquid (avoiding pieces of sausage) and blend until smooth. Use a spatula to scrape all blended beans back into the pot. If desired, mix in 3 tbsp finely chopped parsley. Stir and taste, seasoning with additional salt and pepper (I usually add another 1/4 up to 1/2 tsp salt) if needed (Note 3).
FINISHING: Serve with hot sauce and cayenne pepper, if desired. Serve over cooked rice and enjoy!