
Prepare the liver for the broth. Rinse the diced beef liver well, then place it in a pot with the boiling water and sea salt. Bring to a strong boil and cook for 5 minutes, skimming if needed. Drain off the foamy water and rinse the liver again to remove excess bitterness.


Make the truffle broth. Return the rinsed liver to the pot and add the cold water, truffle extract, turmeric, mace, and lovage. Bring to a boil, then reduce the heat and simmer gently for about 2 hours, until the broth is fragrant and the liver has absorbed the truffle flavor. Taste and adjust with more truffle extract or a little water if the broth tastes too strong or salty. Strain the broth and reserve the liver pieces.



Finish the soup. For each 2-serving batch, combine 2 cups truffle broth with the reserved liver pieces, soup meat or tofu, celery or celeriac, carrot, parsley, and noodles. Bring to a boil, then reduce the heat and simmer for about 30 minutes, or until the vegetables and noodles are tender. Season with pepper, salt, and celeriac sauce or soy sauce to taste before serving.
