Large eggs that William Riker picks up at a starbase and scrambles for his friends in Time Squared, producing a dish only Worf is able to enjoy.
Owon eggs are the eggs of an alien animal, used by Commander Riker in The Next Generation episode Time Squared, set in 2365.
The episode opens in Riker's quarters, where he is cooking for Doctor Pulaski, Geordi La Forge, Data and Worf. He explains that he learned to cook as a boy because his father hated it, and that he bought the eggs at Starbase 73. He whisks them into an omelette with some showmanship.
The result is dreadful. Pulaski and La Forge can barely swallow a mouthful, while Worf clears his plate and pronounces it delicious. The meal is interrupted by the discovery of a shuttlecraft carrying a second Captain Picard from six hours in the future.