Slice squid in half just below the eyes, separating the tentacles from the head; reserve tentacles.
Holding the body, gently pull out the head, intestines, ink sac, and clear skeleton; discard innards.
Working from the cut end of the body, grasp the thin skin. Peel back toward the tip and discard.
Rinse squid body and tentacles before cooking. Slice body crosswise into rings.