If you're feeling extra adventurous, you can eat it raw! If you fold up the nettle leaf, such that it "breaks" the little pricklers (they're like little needles) on leaf, you should be able to eat it without issue.
The trick is to fold/roll the leaf up all over and tightly, so it forms a small compact ball. Your stomach acid is much stronger than the formic acid found in the leaf, so the acid is a non-issue. It also seems to help if you have a lot of saliva in your mouth, if you do choose to eat it raw.
I was in an outdoors camp in elementary school and we actually ate several of these leafs with this method. I don't recall anybody getting stinged, but I know it is a possibility.
I've found a few comments about it here:
The brave can even eat raw nettles! The trick is to carefully fold
them so the spines are within, gather up a bunch of saliva in your
mouth, then immerse them and chew them up -- delicious!
I’ve only been stung a couple times out of hundreds of episodes of raw
I don’t know why saliva neutralizes the sting, perhaps saliva’s
alkalinity neutralizes the formic acid.
The seeds are also delicious, and don’t seem to sting. They have a
mucilaginous quality, and are said to be an adrenal tonic.
Finally, nettles also have strong, durable fibres. You can use the
stems much as you would flax. You have to rinse away the
non-cellulitic material, easily done by putting bundles of the stems
in a stream, weighted down with a rock.
You can eat raw stinging nettle if you fold the leaves UP over the stems and hairs, the trick is to never rub the hairs against the direction they go. OR, you can simply soak the nettles in cold water, or blanch them, and chop them all up in the food processor. All of these methods deactivate the sting, and then you can use them in delicious recipes.
Here's another experience with folding the leaves:
Nettles can be eaten raw by folding the the leaf over to hide the stinging underside as described. Some people, a small minority, are resistant to nettles inside their mouths and don’t need to fold the leaves, but nettle stings inside the mouth are very painful–use discretion.