Heat 3/4 gallon water in a stockpot to near boiling and remove from heat. Add sliced lemon, brewed black tea, and honey.
Stir to dissolve the honey.
lemon balm leaves.
Add the lemon balm leaves and allow to infuse for 15 minutes, then strain the herbs and lemon.
Pour the strained mixture into a 1 gallon carboy using a funnel.
Add cool water to top off the brew, filling to the neck of the fermenter.
When the mead is at room temperature, add the yeast.
Cap with a bung and airlock and allow the mixture to ferment for 1-2 months.
Siphon the mead into a clean carboy, leaving any sediment behind. Re-cap with a bung and airlock and allow the mixture to ferment for another 1-2 months.
Bottle using wine bottles and corks, and allow the herbal mead to bottle condition for at least 1 month (preferably longer) before drinking.
Notes
The original recipe notes that this herbal mead is best made with fresh lemon balm, and that dried lemon balm makes the mead a bit too tannic and bitter.