Originals: Cheese and Onions by The Rutles (covered by Galaxie 500)
The Rutles were a parody of The Beatles created by Eric Idle and with wonderfully authentic sounding songs written by Neil Innes - such good parodies they were that Cheese and Onions eventually had to be credited to (Innes/Lennon/McCartney). The song first turned up in the TV film "All You Need is Cash" and on the album released to accompany it. It was also released as a 7" single.
Galaxie 500 covered it for the Shimmy Disc tribute album Rutles Highway Revisited
I'm not sure Galaxie 500 ever played it live, but on his "Dean Wareham plays Galaxie 500" dates it would occasionally get an airing...