Yes, this casserole can definitely be made in advance! Follow the recipe card through step 3 (finishing the gravy). Then cover with foil and place in the fridge for up to 3 days. When ready to bake, remove from the fridge for at least 20 minutes. Then remove the foil and top with quartered biscuits. Bake 30 minutes or until hot and bubbly and biscuits are golden.