Herbed Cream Cheese Cucumber Rounds

4 oz cream cheese, softened
2 teaspoons finely chopped fresh chives
1/2 teaspoon finely grated fresh lemon zest
1/4 teaspoon fresh lemon juice
1/8 teaspoon table salt
Pinch of cayenne, or to taste
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: finely grated fresh lemon zest

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.

Makes 32 hors d'oeuvres