Pulled Pork Patty Adolph

Slice onion and put in crock pot with roast.  Put rest of onion on top.  Pour ginger ale over all. Cook medium high 4-5 hrs. Dump liquid, save onions if desired.  Pull pork, then return pork and onions to pot  and add sauce.  Cook low 2+hrs.  You can freeze and use later.

(Shoulder or butt roasts are cheap, but good because the fat melts away and is easier to pull.)