*To toast almonds, spread out in a single layer on a baking sheet. Toast in a 350° oven, stirring occasionally, for 8 to 12 minutes. Or, toast in an ungreased skillet over medium heat, stirring, until golden brown and aromatic.
If using cheese slices, cut into small strips.
Combine chicken, celery, stuffing cubes, salad dressing, milk, green onion, salt, pepper, and Swiss cheese. Sprinkle with toasted almonds.
Cover casserole and bake at 350° for 25 minutes. Remove cover and continue baking 10 minutes longer.