Soak cashews in half cup of warm water for 15 minutes.
Take the cashews out of water and transfer them to a small blender jar.
Add garlic, lemon juice, vinegar, salt and black pepper.
Grind them. They will be a coarse paste.
Then add 1/4th cup of water. We have added the same water in which cashews were soaked earlier.
Blitz one more time to a smooth paste.
Taste & adjust the seasoning, if needed.
Mayonnaise is ready.
Notes
You can soak the cashews overnight even or boil them for couple of minutes for quick softening.
Garlic cloves can be adjusted as per your liking. If you like strong garlic flavour, add more garlic and if very mild garlic flavour is your choice, reduce the quantity. Even you can totally skip Garlic.
You can use any type of vinegar in the recipe.
If using black pepper powder, add 1/2 of it. Even its quantity can be increased or reduced depending on your choice.
You may add less or more water depending on your choice of consistency. But note that mayo will thicken more on refrigeration.
Water can be substituted with plant based milk too.
Feel free to add any of your favourite spices or herbs like onion powder. Special mention to Yellow Mustards.