"YeasTea", get it? It's tea fermented by yeast!
Now I am aware that kombucha is also a yeast fermented tea drink too; kombucha is actually what made me think about throwing some yeast into a pitcher of tea to start with. While both drinks do involve yeast and tea, YeasTea differs from kombucha because the kombucha culture is a symbiotic mass of multiple yeast strains and species of acetic acid bacteria, which results in the final drink having little to no alcohol (the bacteria gobble it up) but potentially all sorts of acids, and the YeasTea culture is nothing more than our good friend Saccharomyces cerevisiae, which (despite the fact that I'm using baker's yeast) results in a tea drink that's alcoholic but lacks (for the most part) the same variety of acids found in kombucha.
To make a yourself a batch of YeasTea you'll need the following:
A sanitary glass vessel that can be sealed (I use a boiled mason jar)
A wooden spoon
A candy thermometer
A kettle or other means to boil water
A measuring cup
A 1/2 end volume container to brew tea in (you could just brew the tea in the same glass vessel the drink will ferment in, but I find it easier to use a separate vessel)
1 tea bag/cup
1 tbsp sugar/cup
~1/8th tsp baker's yeast/4 cups
Step 1: Brew the Tea
Boil water and make a batch of tea half the volume of your final intended batch size using 1 tea bag per final batch size cup. So, for example, if you want to make 4 cups of YeasTea, brew a batch of tea using 2 cups of water with 4 tea bags. Let the tea bags steep for between 10-20 minutes.