Place the nuts and water in a blender, and blend to a very smooth, slightly thick liquid.
Place the nut paste in a sterilized ceramic or glass bowl.
Open the probiotic capsules, and empty the powder into the nut paste, Stir or whisk to fully combine.If you are using vegan yogurt as your starter, stir it in the same way.
Cover the bowl with plastic wrap, and place in a warm spot (like an oven with the pilot light on, your microwave with a small dish of warm water or, in hotter temperatures, just leave it on the counter).
Let it stand for 12-24 hours. The set yogurt should be thicker and tangy. The longer you let it ferment before refrigerating, the more tart it will taste. Refrigerate and use within two weeks.