Grease 4 (3 1/2 to 4 inch) soufflé
dishes (about 1 cup each).
Melt butter in medium saucepan
over medium heat. Stir in flour; cook until bubbly, stirring
constantly. Gradually stir in milk and half and half; cook until
thickened, stirring constantly. Stir in pepper, salt, mustard
Remove from heat. Beat in egg
yolks, one at a time. Stir in cheese until melted. Stir in
Beat egg whites with cream of
tartar in large bowl until stiff peaks form. Stir 1/4 of the egg
whites into cheese mixture to lighten. Fold in remaining egg
Divide mixture among dishes.
Bake in preheated 375ºF. oven 25
to 30 minutes or until puffed and lightly browned on top. Serve