Steps
1. Prepare pickled celery root: In a small saucepan, combine white vinegar, sugar, anise seeds, and cinnamon stick. Bring to a boil and let sugar dissolve. Cool completely.
2. Place the thin celery root slices in the cooled pickling liquid. Refrigerate and marinate for at least 2 hours.
3. In a bowl, whisk together soy sauce, truffle paste, Dijon mustard, sugar, and vegetable oil to create the truffle emulsion. Season with salt and pepper.
4. Combine diced beef with the truffle emulsion gently to coat evenly. Keep chilled.
5. For the plate sauce, mix sour cream, horseradish, and lemon juice until smooth. Adjust seasoning.
6. To assemble, arrange a layer of pickled celery root slices on the plate.
7. Spoon the truffle-dressed beef tartare over the celery root slices.
8. Drizzle the horseradish lemon cream sauce around or beside the tartare.
9. Garnish with microgreens or fresh herbs before serving.