Grate the kohlrabi, beets, carrots, and onion in a food processor using the shredding disc.
Wash the beet greens to remove dirt and finely shred with a knife. Place the grated veggies and beet greens into a large colander and press down to remove excess moisture.
Add to a large bowl and mix in eggs, panko, salt, and pepper.
Heat oil in a frying pan and fry until golden and crispy on both sides.
Make Harissa Sour Cream: Add all ingredients to a bowl and mix to combine. Serve with confetti latkes.