Wash all the produce thoroughly, removing any soil from the celery.
Core the green apple and peel the lemon.
Cut the celery stalks, cucumber, apple, and lemon into chunks that will fit through the feeding tube of your juicer or smaller pieces if you’re using a juicer.
If you use a juicer, run the spinach, celery, and fruit pieces through the juicer. Collect the juice in a pitcher.
If you use a blender or food processor, add the baby spinach, celery, cucumber, apple, and lemon to the base. Blend or process on the highest setting until the mixture is smooth or for 20 – 30 seconds. Add a little water if the juice is too thick.
Pour the blended juice through a nut milk bag or a fine cheesecloth. Squeeze it from the top down over a pitcher so the juice drains into it. You can discard the collected pulp or save it and use it for another purpose.
Serve your juice immediately.
