Boil water with caraway seeds and salt.
Chop herbs and ham, fry ham in hot fat in a pan.
Mix cream with yolk and flour and pour into hot water. Add ham, stir well and cook the soup for 5 minutes at moderate heat.
For the soup garnish, heat oil in a pan and toast the toast on both sides until golden brown. Cut into small triangles and arrange on top of soup.
Garnish with fresh herbs and chopped ham.