First of all, thaw your frozen French fries. It will be easier to cut into cubes later.
In a small container, combine lukewarm water and instant dry yeast together. Mix until the yeast is fully dissolved.
In a separate large container, whisk the dry ingredients: flour, salt, and sugar. The flour should be an exact amount according to the ingredients listed above. Use a weighing scale rather than relying on measuring cups, otherwise your dough will be too tough.
Then, pour and mix the yeast slurry onto the dry ingredients container. Continue mixing until they’re homogenous and there are no more visible lumps. Cover with plastic wrap and let rise for an hour or until doubled in size.
Slice the hot dogs and mozzarella cheese into 2-inch long sections, or however you want it. Using a skewer, or disposable chopsticks, skewer the hot dogs and mozzarella sticks. Make sure there’s still space for you to hold on to. Then, set aside for assembly.
Prepare coating ingredients. Cut your French fries into small cubes and get the bread crumbs ready. Place them onto a loaf pan, separately. You can use anything large enough that can hold those ingredients.
Preheat your air fryer to 350ºF (177ºC) for 4 minutes.
While the air fryer is preheating, assemble the Korean corn dogs. a. First, dip the skewered hot dogs into the dough. Make sure it’s completely coated. You can remove excess dough by hand. b. Then, immediately roll it into the chopped French fries.c. Finally, transfer it to your breadcrumbs plate and roll. Again, make sure it’s fully coated. Do this for all your Korean corn dogs. Air fry the Korean hot dogs for 10 - 13 minutes at 350ºF (177ºC). Add a liner to your air fryer basket, first. Then, transfer the prepared corn dogs into the air fryer basket. The corn dogs mustn’t touch each other. So, depending on your air fryer, the maximum amount could be two per batch. Don’t forget to flip halfway through.
Immediately after cooking, using tongs, press the corn dogs to form the round shape. Without doing this step, your corn dog will be flat like in the picture below.
Serve and enjoy! Transfer onto a plate, sprinkle sugar, and drizzle ketchup and mustard.