Preparation time: 6 - 10 hours (fermentation)
1 cup water
1/2 tsp miso or unpasteurized soy sauce
Blend oats at high speed.
Slowly pour in water and miso/soy sauce.
Blend until creamy.
Add some previously made oat yogurt (if available) to speed fermentation
Set in warm place and cover. Do not seal.
Let ferment 6 - 10 hours to desired sourness.