Juice 1 to 2 lemons to make 1/3 cup lemon juice. Add the lemon juice to the food processor
Peel and grate the fresh ginger and add to the food processor.
Add a tablespoon of honey if desired. If you brewed your kombucha for a longer amount of time you might want to add two tablespoons because it won't be as sweet
Blend all the ingredients until smooth. Transfer to a cup.
Using a funnel, add a few tablespoons of the mixture into your bottles with brewed kombucha.
Close the bottles and transfer to a cool place for a day or two for a second ferment.
Refrigerate after one or two days because refrigeration stops the fermentation.
When you're ready to drink, carefully pop open the bottle, pour, and enjoy!
*From one batch of kombucha, you'll get about 14 cups*Any berries work. I prefer blueberries or strawberries or a combination of both*A one inch piece will give you about 1 tablespoon of fresh ginger*This mixture makes about 1 cup (or 16 tablespoons). An average batch of kombucha will make about 14 cups which is about 7 (16 ounce) bottles, so you will probably use between 2 and 3 tablespoons per bottle.*A second ferment will help the flavor develop a little more and cause your kombucha to be fizzier.
Recipe from Living Well Kitchen https://blog.memeinge.com/ginger-berryade-kombucha/