Old Monk Joke

You might be disappointed if you are a fan of Old Monk Rum.
This is probably the oldest Buddhist-monk-joke, and I must have heard it many a times. But the last time, I heard the correct version and finally understood the humor behind it....

There's a barbecue at the Zen Buddhist temple, and the Zen master's working the grill. A young monk reverently approaches.
The Zen master looks up, smiles and says, "Wanna hotdog?"
The monk replies: "Please, Master, Make me one with everything."

continuing with the other part....
After taking the hotdog, the monk pays for it with a $20 bill and asks for change and the Zen master replies: "Change must come from within"