Wash 2–3 karelas thoroughly
Trim the ends
Peel lightly if desired
Cut lengthwise
Remove the seeds
Chop into small pieces
Sprinkle salt over the pieces
Rest for 10–15 minutes
Squeeze out the bitter water
Rinse the pieces if needed
Add the karela pieces to a blender
Add 1/2 to 1 cup water
Add a small piece of ginger if desired
Add lemon juice if desired
Blend until smooth
Strain the juice through a sieve or muslin cloth
Pour into a glass
Add black salt or honey if desired
Serve fresh