# Put the oil into a pot and make it hot. Then, add diced
onion in it and roast the
onion.
# Add the diced
carrot,
celery and
potato onto the
onion respectively. Sauté the mixture until the ingredients turn to transparent.
# Add 7 tbsp of
chicken broth onto the vegetables and wait until the mixture reaches to the boiling temperature.
# Meanwhile, pick the boiled
chicken into small pieces. When the mixture of vegetables reaches to the boiling temperature, add the
chicken in it.
# Whisk the mixture of
flour, egg,
chicken broth and
lemon juice in a deep bowl, and add some boiling soup onto the mixture also to make it warmer also.
# Pour the liaison into the soup at once and stir the soup.
# Finally, add black
pepper and salt also into the mixture. Turn the heat to low and cook the soup for 5 more minutes.
# Serve it hot, just after removing it from the stove.
