That's what I did. It was too fat to get in a pint jar, so I put both halves, cut side down, in a dish of water. I think I better get another couple of potatoes to try the regular way with, just in case.
Select a site with full sun and well-drained soil. Prepare the garden bed by using a garden fork or tiller to loosen the soil to a depth of 12 to 15 inches, then mix in a 2- to 4-inch layer of compost.