Herbed Cream Cheese Cucumber Rounds

Name: Herbed Cream Cheese Cucumber Rounds
Ingredients: 4 oz cream cheese, softened; 2 tablespoons thinly sliced fresh mint; 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: tiny fresh mint leaves and finely grated fresh lemon zest