Remove the skin from the pears, cut them into quarters and remove the core. Cook them al dente in sugar water with the juice of one lemon.
Remove a little milk and mix the starch flour with it. Heat the remaining vanilla sugar, sugar, milk and spices until boiling. Add the starch to the boiling milk, beat well, add the egg yolks and remove from the heat. Add the butter in flakes.
Add the pear quarters with one eighth of the cooking liquid to the milk and serve hot.