This from the groaners listserv.

A broccoli, a tomato, and a yam were running in a race.

The broccoli got off to a great start, but being a green runner, didn’t
have the strength to finish the race.

The yam and the tomato were neck and neck for the first stretch, but the tomato quickly fell behind.

The yam was about to reach the end of the track, but collapsed in
exhaustion right before the finiish line.

In the course of an hour, the tomato ran the entire length of the race, and won.

Why was the tomato so successful?

The tomato paste itself.