Lemon Soup

Directions

1. 1
   Put the jus roti in a medium saucepan and bring it to a boil over medium-high heat; turn off the heat as soon as it boils.
2. 2
   Meanwhile, grate the zest of the lemon.
3. 3
   Juice the lemon.
4. 4
   Use a whisk, an electric mixer, or a blender to combine the egg yolks, flour, and sour cream until smooth.
5. 5
   Continue to mix while slowly adding the jus roti.
6. 6
   Stir in the grated lemon zest and lemon juice.
7. 7
   Transfer everything back to the saucepan and reheat the soup gently; taste and adjust the seasoning (you might like to add more lemon juice), then garnish with the croutons and serve.