Snowball, if you do an Advanced Search on Google and type the exact phrase "Sage and Onion Stuffing", you get over 22,000 hits.
We have a lot of stuffing recipes on DC, too, and you can use the Search button here, as well.
You could start with this thread Whats your favorite stuffing recipe?
, since many of the posted recipes use sage and/or poultry seasoning which contains sage.
Maybe Ishbel will post the sage and onion recipe she referred to in that thread. I'd imagine it's pretty much bread cubes, chicken stock, sauteed onions, celery, butter, and sage.