Prepare The Sandwich Spread By Mixing Together The Mayonnaise And Blue Cheese Dressing. Spread 2 Tablespoons On One Side Of Each Slice Of Bread. Top 4 Of The Prepared Pieces Of Bread With 1/4 Each Of The Chicken, Avocado, Bacon, Hard Boiled Eggs, And Lettuce. Top Each Sandwich With Another Slice Of Bread And Serve With The Remaining Blue Cheese Spread On The Side.