To pass this week's challenge, you have to eat only a cup of rice & beans for a day.
The abundance that we have in Western society is tremendous. It's easy to become complacent with consuming the fruits of that abundance and to lose sight of just how good we've got it. Take the opportunity to remind yourself that while abundance and indulgence are fun and enjoyable, it's not required or even necessary for your survival.
You're stronger and more durable than you give yourself credit for. Try it out, just for a day.