Churros y chocolate. "The traditional hot chocolate served in Spain doesn't contain eggs. It is a thick chocolate cream usually thickened with a bit of cornstarch or made with a special kind of chocolate that contains thickeners." Recipe for both included here, though she refers to the chocolate as "Spiced Chocolate Bisque." About right.... :-)
Ovocné knedlíky A staple sweet dish in Czech home cooking, and one that's fortunately made a return to several restaurants in Prague, ovocné knedlíky are delicious fresh fruit dumplings, generally filled with seasonal strawberries, apricots, plums, or plum jam. To avoid singling yourself out as a tourist, order these for lunch rather than breakfast or dessert.
Herb-infused Spa Water Recipe - Blend up a cucumber and pour it through a very fine strainer (I like to line a sieve with cheesecloth). Let this concoction drip through in the fridge overnight. Mix the resulting cucumber juice with a pitcher of water (you can stretch this out this depending on how strong you like it ).