Beetroot can stain your hands and cutting board, so use a suitable chopping surface.
Step 3: Prepare the Other Ingredients
If using an apple, wash it, remove the core, and cut it into pieces. Squeeze the lemon if you want to add a refreshing citrus flavor.
Step 4: Blend Everything Together
Place the beetroot cubes and water in a blender. Add the apple if desired. Blend for approximately one to two minutes, until smooth.
If your blender is not powerful enough to process raw beetroot, grate it first or steam it until tender and allow it to cool before blending.
Step 5: Adjust the Texture
Add a little more water if the mixture is too thick. You can strain the drink, but keeping the pulp retains more fiber.
Avoid adding sugar, since the beetroot and apple already provide natural sweetness.
Step 6: Serve Fresh
Pour the juice into a glass and add lemon juice if desired. Drink it fresh, or refrigerate it promptly in a covered container if you need to save it briefly.