Form into 8 inch roll, place on greased cookie sheet. Brush with egg white that was beaten with sugar and sprinkle with anise. Bake in oven for 30 minutes. Remove and cool. Lower oven to 250 degrees.
Slice log with serrated knife.
Place biscotti on rack on sheet and bake 20-25 minutes more. Store in air tight container. 6 blood oranges, peeled, sliced into rounds Cut off tops, reserving feathery tops. Slice fennel very thin. Toss fennel with dressing.