Normally we would not salivate over the thought of plain old beans and rice. However, add a little Cajun seasoning and smoked sausage and now you have a real meal packed with flavor.
Be sure to keep the beans covered with liquid or they will burn quickly. Add the crushed red pepper flakes a little at a time, cook a few minutes and then taste for spiciness. It takes a minute for the full effect of the pepper to kick in and pepper flakes can be overpowering.