Wash and peel the parsley roots thoroughly. Grate them finely.
Scald the lemon with boiling water and gently grate only the peel, avoiding the white part (albedo).
Place grated parsley and lemon zest in a sterilized jar.
Pour apple cider vinegar over everything and (optionally) add honey.
Close tightly and set aside in a dark, cool place for 3–5 days. Gently shake the jar occasionally.
After this time, strain the elixir through gauze or a fine strainer and pour it into a clean bottle.
