Blanche fresh or rinse beans. Pat dry. In a cast iron skillet or pan cook bacon slices until crisp. Set bacon aside and drain fat but reserve 1-3 tablespoons. (depending on the amount of beans)
Heat the reserved bacon dripping over medium to medium-high heat.
In a bowl combine green beans and onion. Toss the mixture with creole seasoning.
Add the green beans and onion mixture to the hot pan. Cook for 1-2 minutes and stir then cook for 1 minute and stir until the green beans are a little blackened and the onions are crisp tender.
Crumble bacon over top and serve.