Terbiyeli Kereviz

Directions

1. 1
   Put the celeriac in a pan and cover with water.
2. 2
   Add the juice of 1/2 lemon, some salt, and the sugar, and simmer, covered, for 2030 minutes, until tender.
3. 3
   Just before serving, beat the egg yolks with the remaining lemon juice, and pour into the pan, beating vigorously.
4. 4
   Do not let it boil, or the eggs will curdle.
5. 5
   As soon as the sauce has thickened slightly, serve immediately.