Wash and prep: Rinse spinach, cucumber, lemon, and apple well. Peel the lemon (if blending) and ginger.
Core the apple. Roughly chop everything into blender-friendly chunks.
Choose your method: If you have a juicer, feed cucumber, spinach, lemon, apple, and ginger through. If using a blender, add all ingredients with 1/2–1 cup cold water or coconut water.
Blend until smooth: Start on low, move to high, and blend until the mixture looks silky and bright green.
Strain (optional): For a smoother, juice-like texture, pour through a fine-mesh sieve or nut milk bag.
Press to extract as much liquid as possible.
Taste and adjust: Add a squeeze more lemon for brightness, a few mint leaves for freshness, or a pinch of salt to sharpen the flavors.
Serve cold: Pour over ice and enjoy immediately for the crispest taste and best nutrient retention.