This recipe is a good starting point for your own experiments. Replace spinach with kale or romaine lettuce, swap apple for pear, or use mint instead of cilantro. Straining the juice through a sieve gives a smoother texture but removes most of the plant fiber. Leaving it unstrained keeps all the fiber intact. Drink the juice within 24 hours for the fullest flavor.
The Vitamix processes cucumber, apple, and baby spinach as whole-fruit without a juicer — fiber, cell juice, and aroma stay fully in the glass. A slow juicer would discard apple pulp and spinach fiber as pomace; here everything comes through, optionally strained at the end. The speed ramp (low→high) prevents splashing with the water-rich cucumber.