Meanwhile, place 2 egg yolks (including
the 1 reserved), remaining 2 tsp lemon
juice, 1/8 tsp of the salt and the cayenne in
a blender; process until combined. Melt
butter in a bowl in microwave for 1 minute,
covering to avoid splatter. Slowly stream
melted butter into blender while running;
hollandaise should thicken immediately.