Finely chop the celery and the tomatoes. Mix with the salt, olive oil and lemon juice and divide the mixture over the bread slices or over the rusks. Cut the avgotaraho in thin slices and lay them over the vegetables. Grind pepper over the avgotaraho and sprinkle with a few drops of oil.
Tip: you can also mix all the ingredients (except the dark bread or the rusks) and add the mixture to a green salad.