Mix until combined. Divide dough in half. Blend in flour, salt and nutmeg. Sprinkle with reserved cheese filling. Cover and keep warm.
Cheese mix together in medium bowl.
Stir in remaining ingredients. Cook over how heat, stirring constantly, until smooth and bubbly, remove from heat. Add spinach to flour. Creamy sauce heat butter over low heat until melted. Return to heat and bring to boil, stirring constantly.