Preheat oven to 350 degrees.
Layer 1: In 9 X 13 casserole dish, melt 1/2 stick of butter. Spread shredded chicken over butter. Sprinkle black pepper and dried sage over this layer. Do not stir.
Layer 2: In small bowl, mix milk and Bisquick. Slowly pour all over chicken. Do not stir.
Layer 3: In medium bowl, whisk together 2 cups of chicken broth, chicken granuels and soup. Once blended, slowly pour over the Bisquick layer. Do not stir.
Bake casserole for 30-40 minutes, or until the top is golden brown.