My lunch... For about $1.50

Ramen noodles are so versatile, I use them quite often in various dishes including soups and pan fried noodle dishes. Also being rather inexpensive, they last forever.
They can be flavored with just about anything and any ingredient can be added. They are great for using leftovers in and you can make anything from 1 serving to 100 with enough packages.

I am working on a more detailed article on Ramen (Ramen wiki) so check back for updates.