A traditional Klingon dish that William Riker tries in Ten Forward, and declares he rather likes, while preparing to serve aboard the IKS Pagh in A Matter of Honor.
Bregit lung is a staple of Klingon cooking. It is seen in The Next Generation episode A Matter of Honor, set in 2365.
Having volunteered to become the first Starfleet officer to serve on a Klingon ship under an exchange programme, Riker orders a spread of Klingon dishes in Ten Forward to accustom himself to the cuisine. Doctor Pulaski and Captain Picard look on with some dismay as he works through pipius claw, heart of targ, gagh and bregit lung, which he singles out as a favourite.
Once aboard the Pagh, Riker sits down in the mess with the crew and tucks in with enthusiasm, earning their approval. The dish is mentioned again in later Klingon stories as ordinary warrior fare.