K'Tesh's Klingon Recipe Pages: Recipe for Watercress Sandwiches
Watercress Sandwiches: Also Seen in "Journey's End", Riker lists this as one of the different items being served.
I'm just guessing here, white bread, with crust removed, divided into quarters (triangular) with watercress filling, maybe some Mayo or other dressing. Served on a rectangular serving tray. Serve with Bularian Canapés and Earl Grey Tea.
Recipe from:
K'Tesh's Klingon Recipe Pages
http://www.klingonfood.com