Preheat oven to 350 F.

Open green bean cans, drain, and add to a 9" x 9" casserole dish.

Heat a large skillet over medium-high heat.

Add the bacon and cook until starting to crisp, stirring often.

Add the onion and cook until the bacon is crisped and the onion starts to soften.

Add the ketchup, Worcestershire sauce and brown sugar. Stir and cook another 3 minutes.

Pour bacon mixture over the beans and stir to combine.

Place in oven and bake for 20 minutes.