Preheat oven to 350 degrees
Melt the butter in a medium saucepan. Add the flour and stir for 1 min.
Stir in the broth and milk, brining to a light simmer. Season with salt and pepper.
Add the green beans and cook for 5 mins or until warmed through.
Get a 13x9 inch baking dish and pour in the green bean mixture; top with fried onions.
Bake for 20 mins or until bubbly.