Harvest carefully to not damage the skin.
Dig it out carefully with a garden fork and pry then up from beneath the bulb. Don't pull out by the stalk. Shake off any dirt that comes away easily, don't wash them or go crazy removing the dirt.
If you have softneck you can braid them to hang, otherwise you can lay flat in a single layer on wire racks. Keep them out of the sun and air moving around them. I've read they cure better when the space gets hot (90+) but still has good air movement.
I'm sticking them in the shed on that rack with the cover removed and fans blowing.