I need help!

I recently decided that I wanted to knit a pair of fingerless gloves for myself, following the Fetching pattern from Knitty.com. I knitted the first one up using Malabrigo yarn (a yummy, super soft merino wool) and I love how it turned out:

However, I don’t like the fit at all My fingers feel too bare and they feel awkward. So I guess fingerless gloves aren’t for me. But I really love how they look and I want to make them into mittens.

Does anyone know how I can do that? I have never made mittens before, and wouldn’t know where to start!!!