Soak cashews in filtered water (this soaking water is in addition to that shown in the ingredients) for at least 30 minutes or up to 4 hours and drain. Note that if you have a high powered blender, 30 minutes is sufficient, but that longer periods may be required for less powerful blenders.
Add the cashews, the filtered water, lemon juice and wine vinegar to the blender and blend to produce a smooth creamy consistency. You may need to scrape down the sides of the blender to ensure that all of the cashews are blended smoothly.
Add the nutrional yeast, sea salt, avocado, sriracha and dijon mustard to the cashew cream in the blender and blend until smooth. Place in a suitable container and store in the refrigerator. The mayo will thicken in the refrigerator.