Fry up the bacon in a large pot until crispy. Add onion until translucent to the bacon, then add garlic and cook for about 30 seconds. Remove the bacon, onion, and garlic from the pan. Set aside. Do not toss out the bacon grease.
Add the chicken broth. Make sure the green beans are slightly covered with the broth, then add the Cajun seasoning and the red pepper flakes.
Cover the pan, and simmer for about 1 ½ hour, then drain before adding the bacon mixture back, and you’re good to go. Let’s eat!