Prepare your ingredients by gathering all together to ensure you have everything at hand before you begin cooking.
Combine all ingredients in the slow cooker, including the dried red beans, sausages, onions, celery, garlic, bay leaves, water, bouillon cubes, and Cajun seasoning.
Stir well to mix all the flavors together before covering it with the lid.
Set your slow cooker to high heat for six hours, allowing the spices to meld beautifully with the beans.
After six hours, check on your beans; if you prefer creamier beans, mash some against the side of the pot using a spoon.
Once perfectly cooked, serve your flavorful red beans over a bed of rice for an authentic experience.