Growing your own Green Onions

I saw this on Pinterest and had to try it.

I took a few green onions and cut off the green portion, leaving the white roots.

I put them in a glass of water and set them by a window.  Every 2-4 days, I dump out the water, rinse the roots, and put new water in the glass.

After a few days they started growing!  Imagine never having to pay for green onions again!