Its been a while since I last played this way. 
2 liters water
3/4 (scant) cup sucanat (could probably use 1/2 a cup or less even?)
1 Tbsp sassafras bark
2 tsp cinnamon chips
1 tsp grated dried ginger
1/2 star anise pod
1 toasted cardamom pod
1 clove
3 allspice berries
Simmer on stove for a while then allow to cool to between room and blood temperature.
Pour to vessel and add ~1/4 cup of sourdough starter.
Wait.
I'll probably rack this into two 1 liter bottles in a few days.
Makes something between soda and beer. Sour flavor.
#grownostr #drinkstr