Step 3: Mix it up, add water
Stir it up.
Add water - Use non-chlorinated water, because it will kill the bacteria that we are trying to promote. I used tap water that I set out in a bowl for a day to let the chlorine evaporate out. Maybe you have some better water.
Pour water over the dry ingredients until it just covers the surface. In a few hours the oats, nuts, and seeds will absorb some of the water and expand, so the water will not cover the surface anymore. We want a consistency of a thick oatmeal (it basically is just thick oatmeal).
Cover the container with a cloth to keep dust and flies out.
Optional - You could add a spoonful or two of active yogurt or soy yogurt to the mix. This would introduce those specific bacteria strains. I think it's unnecessary because the bacteria naturally present on the food and in the environment will do the job, and they are much more diverse.