Cordon Bleu Chicken #2

INGREDIENTS:

Casserole
4 c Cubed cooked turkey
3 c Cubed cooked ham
1 c Shredded cheddar cheese
1 c Chopped onion
1/4 c Butter or margarine
1/3 c All purpose flour
2 c Light cream
1 ts Dill weed
1/8 ts Dry mustard
1/8 ts Ground nutmeg