We start with homemade mayonnaise. In a bowl, mix the yolks, sugar, salt, pepper, mustard with a whisk. You can use a mixer at low speed.
Pour the oil mixture in a thin stream into the yolk mixture and continue to mix with a mixer. After a few minutes, add lemon juice and beat a little more.
Fry chicken fillet in a frying pan, seasoned to taste. Cool slightly and cut into small pieces.
In a dry frying pan, fry the slices of bread until golden brown, or dry in the oven for several minutes.
Cut the iceberg lettuce into small strips, and also cut the tomato into slices.
Assembly: grease slices of bread with homemade mayonnaise, lay chicken slices, then tomato and iceberg lettuce.