If I'm understanding it correctly, you would, of course, cast on one stitch. After the 1st stitch, you would need to make an increase (M1) and continue to do that at the beg. of each row, knitting the first stitch of each row and doing the M1 increase after knitting the first stitch. Here's the link to Amy's increases videos.
http://www.knittinghelp.com/videos/increases