I apologize in advance, that there are photos of the whole process, but I will try to describe it in detail... the Baguette toast. Cut onion into very thin half rings and fry in mixture of olive and butter. Spinach cut into strips, add to the onions and fry gently 3 minutes, season with salt and spread on the baguette.

Boil water in a saucepan, pour the vinegar and a ladle to do in the water funnel, break in the egg and cook for about 1 minute. The egg spread on the baguette, then be sure to mash them with a fork.