Breading for chicken breast: Mix pre-cooked breadcrumbs with flour, salt and black pepper. Whisk the egg in a separate bowl.
Beat the chicken breast to 0.5 cm. Roll in the breading mixture and then in the egg. Fry on both sides in a frying pan preheated with olive oil. Lay on the surface so that the stack of excess fat.
Preparation of the sauce: in a mortar, crush a few basil leaves with a little olive oil until pureed. Add mayonnaise, ketchup, chili pepper, salt to this mixture.
Cut the ciabatta into 4 pieces (or 2 depending on the size). On the lower part put 1.5 - 2 tbsp. l. sauce, a few lettuce leaves, chicken breast, a few thinly sliced tomato rings and red onion. For greater juiciness, you can put another 1 tbsp on top. l. sauce. Cover it all with the top of the ciabatta.