Shred the sunchokes and onion in a food process or by hand. Lightly squeeze out any moisture.
Add the flour to the shredded mixture and season to taste.
Heat the oil to 360-375 degrees. Using a 2 1/2 Tbsp scoop portion out the mixture and carefully add it to the pan.
Cook both sides until brown and then place them on a paper towel to drain. Add a sprinkle of salt to the warm latkes and serve.