Preheat oven to 400.
Melt butter in 9x13 pan in oven.
Layer cooked chicken over melted butter in the bottom of your baking dish
Sprinkle with black pepper (optional) and 1/2 tsp. seasoning salt
Mix together milk and Bisquick or flour (we used self-rising flour and it worked just fine!)
Gently pour Bisquick mixture over chicken.
Whisk chicken broth, sage, bouillion cube and cream of chicken soup, then slowly pour over Bisquick layer (I heated my broth to help disolve the bouillion cube before mixing.)
Bake at 400 for 30-40 minutes, until golden brown & bubbly.