Strain the pan juices into a bowl and skim off the fat. In a deep skillet, melt the butter. Add the scallions and paprika; cook over moderately high heat until the scallions are softened. Add the Calvados. Using a long match, carefully ignite the Calvados; let the alcohol burn off. Add the apples and pan juices and cook until the apples are just heated through. Season the sauce with salt. Carve the ham and serve with the sauce.