Combine butter and cheese and mix well. Add rest of ingredients, except pepper and pecans. Add a few grains of cayenne pepper. Mix thoroughly. Divide into 4 pieces. Roll each into a cylinder (silver dollar size), wrap in foil and freeze. To serve, partially defrost roll, cut slices ¼ inch thick, top with pecan halves if desired and bake on a greased cookie sheet at 400 degrees F for 8 to 10 minutes. Remove from pan while warm to prevent breaking.