Kani Kyuri Ikomi, a traditional Japanese Appetizer. These were well received by everyone I made them for, though I admit I didn't eat them myself- I don't like cucumber. ;
Thank you to *Silurian who ate the for me after I made my second batch for this tutorial.
Something other than crab? Or something other than seafood? I think shrimp or salmon or ahi tuna would work well in the kani kuri ikomi. But if you'd like something that does not come from the water you could try thin slices of pork, grated daikon, or even a cream cheese- something like Alouette's garlic and herb, or tomato and basil would work well. ^^