1/2 medium seedless cucumber (usually plastic-wrapped)
3 medium radishes
Coarse sea salt for sprinkling
Special equipment: a Japanese Benriner* or other adjustable-blade slicer
Garnish: tiny fresh mint leaves and finely grated fresh lemon zest
Directions
Stir together cream cheese, herbs, zest, lemon juice, table salt, and cayenne.
Slice 32 (1/8-inch-thick) rounds from cucumber with slicer. Trim bottoms from radishes, then slice into 32 (1/16-inch-thick) rounds with slicer. Top each cucumber slice with a radish slice and 1/2 teaspoon herbed cream cheese. Sprinkle with coarse sea salt and serve immediately.