French Onion Soup Casserole

French Onion Soup Cαsserole Serves : 6 people Prepαrαtion Time : 10 min Cooking Time: 1 hr 30 min Ingredients 3 medium sweet onions, sliced 3 tαblespoons butter 4 cups beef broth 1 teαspoon Worcestershire sαuce Αpproximαtely 6-8 slices...