Food Network Champs -- We Blew Our Prize Money on PING PONG!

The winners of "The Great Food Truck Race" on Food Network could have spent their 100k prize money on anything -- but they REALLY like ping pong.

23-year old Daniel Shemtob and 25-year old Jason Quinn -- two of the guys who run a gourmet roach coach called The Lime Truck -- sprung for a top of the line ping pong table to go in their house as soon as they won the competition.

We're told the table tennis games have consumed their lives so much it's become the focal point of their free time ... and they even made their own paddles for good luck.