Add the butter and beat vigorously with a wooden spoon, mashing the cheese and butter together against the sides of the bowl until the mixture is light and fluffy.
Beat in the chives, fennel, chopped parsley, paprika, and caraway seeds.
Mound the cheese-herb mixture in the center of a platter and arrange the tomatoes, olives, parsley sprigs, radishes, and scallions attractively around it.
Serve at room temperature with rye or pumpernickel bread