In a clean glass jar, add flour, kombucha yeast and kombucha. Mix together. Cover with a tight-weave dishcloth and use an elastic to keep it in place. Keep away from direct sunlight at room temperature.
Feeding your starter:
Discard ½ cup starter, then add ½ cup brown rice flour and ½ cup water or plain kombucha everyday to feed it.
Using your starter:
When the starter is bubbly and lively, use it with your favourite gluten-free sourdough recipe.