Rinse and sort beans in a large pot. Cover with 6 – 8 cups water. Bring to a rapid boil and boil for 2 minutes. Remove from heat. Cover and let stand 1 hour. Drain and rinse.
Clean the pot. Heat the oil in the pot over medium heat. Add the onion and bell pepper. Cook until tender, about 3 – 4 minutes. Add the garlic and cook until fragrant, about 1 minute.
Stir in the rice cook, stirring continuously, until the rice is toasted, about 2 minutes. Slowly add 2 cups of chicken stock, tomato paste, Cajun seasoning, and hot sauce. Bring to a low boil.
Add the tomatoes and all the juices, red beans, bay leaf, and remaining chicken stock. Season with salt and pepper, to taste. Bring to a boil; reduce heat and simmer for 1 hour uncovered.
Add the sausage and cover. Continue to simmer over low heat for another 30 – 45 minutes, or until the beans are tender.