Brew a batch of homemade kombucha. When it's ready to be bottled for secondary fermentation (after 7 to 10 days of brewing), follow instructions below.
Add the strawberries, sugar, water and basil to a saucepan and bring to a full boil.
Reduce heat and simmer for 10 minutes. Remove from heat, mash the strawberries with a fork and allow mixture to cool to room temperature (to speed up this process, pour the mixture in a bowl and refrigerate).
In a large glass pitcher, combine half of the strawberry-basil mixture (including the pulp) and half of the kombucha. Stir well.
Pour the strawberry-basil kombucha into 16-ounce glass flip cap bottles ¾ of the way up. Distribute the strawberry and basil pulp between the bottles.
Repeat for the remaining half of the kombucha and strawberry-basil mixture.
Seal flip cap bottles and leave in a warm, dark place for 2 to 4 days for secondary fermentation. Refrigerate all of the bottles to chill before drinking (refrigeration also slows the fermentation).
When ready to drink, point the bottle away from your face and carefully open, as gasses will have built and the kombucha will be fizzy.
Using a small fine strainer, strain the kombucha into a glass and discard the pulp.
A kombucha a day keeps the doctor away!