These sandwiches were created by Food and Wine's Marcia Kiesel. They are open-faced and perfect with tea. "For graphic fun, look for radishes of varying shapes and sizes". From March 2008 Food and Wine Magazine.
In a small bowl, blend the softened butter with the lemon zest and lemon juice and season with salt.
Spread the bread slices with the lemon butter. Using a 1 1/2 inch round biscuit cutter, cut 16 rounds from 4 slices. Cut the remaining slices into 2 1/2-by-1 inch rectangles. Top with the parsley leaves and radish slices. Serve at once, or cover the sandwiches with plastic wrap and let stand at room temperature for up to 2 hours.