Soak overnight; 1 cup raw nuts of your choice
Discard the soak water, then put the soaked nuts, 1/4 tsp of salt, vanilla essence (if using) and 4 cups of water into your Omniblender. Put the lid on.
Blend for 60 seconds.
Put the nut milk bag into your large (at least 1 litre capacity) jug. Pour the blended almond mix through a sieve. Press the solids with the back of a spoon. Hang the bag to let it drain. Squeeze to get as much liquid out as possible.
Transfer to a glass bottle and refrigerate. Use within 3 days.