Play word 温泉たまご 温泉たまご おんせんたまご egg slow-boiled so that the yolk is hard but the white is still soft (traditionally cooked in a hot spring)
Play word 鶏卵素麺 鶏卵素麺 けいらんそうめん sweet of egg yolks drawn into strands and boiled in sugar syrup (orig. from Portugal)
Play word 托卵 托卵 たくらん brood parasitism (planting one's eggs in another bird's nest, as demonstrated by the cuckoo, etc.)