Using a box grater, coarsely grate the potatoes, carrots, and kohlrabi. You should have about 4 cups of root vegetables total.
Using cheesecloth or paper towels, squeeze out any excess water from the veggies.
Add 1/4 cup of flour and seasonings and mix using a rubber spatula.
Whisk the egg and add into the vegetable mixture.
Heat up the oil in a large skillet on low-medium heat.
Form 4 round patties with the vegetable mixture. Be sure to flatten them out slightly so they cook evenly. Once pan is hot, carefully add in the patties. Press down slightly with spatula.
Cook about 5 minutes per side, or until golden brown.
Serve with fried eggs, avocado, and your favorite hot sauce for a delicious brunch!