Cube breasts into nugget sized pieces.
Season to taste whether it be flour salt/pepper etc or a commercial coating like shore lunch or Frying' Magic
Brown nuggets fairly quickly, don't fully cook them
Assuming you're feeding ~4 ready 1/2 bag/box of stuffing unless you like leftovers, then make it all, Use chicken broth instead of water, it tastes better. We like to add in a package of original or chicken flavored Lipton wild rice to the stuffing, but it's optional.
Place browned nuggets into a cook-in bag for no mess, or the bottom of a roaster if it's not your turn to do the dishes
Cover the nuggets with your stuffing and place in 350 degree oven for ~45min. If using a cook-in bag, cut the top off @ 45min and place back in the oven for ~15min, if using roaster, remove cover @ 45min and cook an additional 15. The idea behind the last step is to crisp up the top layer of stuffing.
I like a little gravy with the above. One can save the browning drippings, use some chicken broth/cornstarch, or Heinz Turkey gravy in the glass jar is pretty good when you're in a pinch/hurry.