Korean radish has firm crisp flesh and a slightly sweet and peppery taste. It’s a cold weather vegetable, so the radish tastes best in late fall and winter.
Clean the radish and carrot by scrubbing with a brush and/or scratching off the stubborn impurities with a small knife. Cut into match sticks. You can use a mandoline if you have one. Use the thickest blade.
Add all the remaining ingredients. Mix well by hand until the sugar is dissolved and the radish is evenly coated with the gochugaru (if using). Taste and add more vinegar or sugar to your liking.