The buddha is walking in Central Park (here is where I begin to laugh at the notion) when he decides to get a hot dog (the joke could end here and I would be happy).
He walks up to the cart and says, “Make me one with everything.”
(I had a student who said his grandmother often told this joke but with the punchline, “I’d like one with everything on it.” I do not think she was necessarily less funny. Rather on account of her relative proximity to death she may have been concerned with different things, for instance plenitude and its connection to sexuality, viz.