Step 1

Place the cashews in a mason jar or glass bowl. Add 2 cups (500 mL) boiling water. Let stand for 15 to 20 minutes until very plump. Drain and rinse the cashews.

Step 2

In a small food processor or handheld blender (i.e., bullet-style blender), process the cashews, water, lemon juice, mustard, garlic powder, and salt.

Step 3

Stop and scrape the sides and bottom of container multiple times until the mixture is very smooth creamy-looking, and the consistency of mayonnaise (be patient, this will take a good amount of stopping,  starting, and scraping--about 3 to 4 minutes).

Step 4

If desired, add more water for a looser mayonnaise. Taste the mayonnaise and add more salt, mustard, garlic power or lemon juice as desired.