Preheat oven to 350 degrees.
Open and drain green beans and set aside.
Cook chopped onions in ICBINB on medium heat for 5 minutes to brown and cook until translucent while adding Worcestershire sauce, and garlic powder.
In mixing bowl combine milk and mushroom soup, mix well.
Fold in onions and green beans to the soup mixture.
Pour mixture into a baking dish and spread evenly.
Sprinkle cheese on top.
Place in the oven to cook for about 25-30 minutes.