What pasta is to Italian families, and what rice soup is to many Asian families, red beans and rice is to the Cajun culture. Usually made in a large pot, then recooked, and added to several times. No specific recipe, since each family has their own idea what is "best."
A general idea:
Green peppers, sausage, a Ham bone and dried beans are boiled at least 6 hours. (The beans being soaked the day before). Often bacon drippings or other grease is added to make it "tastier." It is then served in a large bowl over a large scoop of white rice. Add Tabasco Sauce to taste. Mmm Good.
In Louisiana, it is ubiquitous.
One of the few dishes I can fix for large groups of people without messing it up. (Which means it is easy.)