Tuna Tartare with Wasabi

Serve this tuna tartare as an elegant appetizer or first course. Place the tuna center stage on an oversize plate with an artful flourish of paper-thin cucumber slices strewn around it. A drizzle of extra-virgin olive oil, a scattering of minced chives, and a dusting of fleur de sel make this a showstopper for a sophisticated dinner party. Buy your tuna from a reputable fishmonger to ensure that it is very fresh.