PREHEAT OVEN TO 350 DEGREES.
PLACE BONELESS, SKINLESS CHICKEN BREASTS IN SAUCE PAN WITH ENOUGH WATER TO COVER THE CHICKEN. BRING TO A BOIL, THEN TURN OFF THE HEAT; PLACE A LID ON YOUR POT AND ALLOW TO SIT FOR 10-15 MINUTES TO FINISH COOKING.
REMOVE CHICKEN FROM STOCK (RESERVE THE STOCK) AND ALLOW TO COOL, THEN SHRED THE CHICKEN.
WHEN BUILDING THE LAYERED CASSEROLE, DO NOT MIX THE LAYERS.
LAYER 1 – IN 9×13 OR LARGER CASSEROLE DISH, MELT 1 STICK OF BUTTER. SPREAD SHREDDED CHICKEN OVER BUTTER. SPRINKLE BLACK PEPPER AND DRIED SAGE OVER THIS LAYER.
LAYER 2 – IN SMALL BOWL, MIX MILK AND BISQUICK. SLOWLY POUR OVER CHICKEN.
LAYER 3 – IN MEDIUM BOWL, WHISK TOGETHER 2 CUPS OF THE CHICKEN STOCK (STRAINED, IF NEEDED), CHICKEN GRANULES AND SOUP. ONCE BLENDED, SLOWLY POUR OVER THE BISQUICK LAYER.
BAKE UNTIL THE TOP IS GOLDEN BROWN- APPROX. 50-60 MINUTES.