The easiest way: just an egg, a little sugar (you can add more if you like sweets) and flour. Put the egg white and sugar into a Tupperware shaker, cover it tightly and shake it vigorously until the egg white becomes foam. Then put it into a special bowl for microwave oven with egg yolk, add sugar and a little flour, and stir it into a paste slightly. Just put it in the microwave for two minutes. Very simple