Place all the ingredients into a mixing bowl. No particular order.
Using an immersion blender, blend all the ingredients until nice and smooth.
Heat a large frying pan or crepe skillet with about a tablespoon of oil.
Spoon about ¼ cup of batter into the pan.
Swirl the pan, aiming to get the batter to cover the entire surface of the pan.
Once the crepe sets (this will happen quickly, after about a minute or less), flip it over with the help of a spatula. Cook the other side for another half a minute or so. You don’t want the crepes to be too done (read crispy). They still need to be soft enough to roll.
Once done, place the crepe on a plate. When the next one is done, place it directly on top of the previous one. Continue frying crepes, like this, one by one.
Once the crepes are done, divide them into manageable stacks (about 15 crepes or so). Roll them tightly into a log.
Cover the log with silver foil. At this point I recommend freezing the crepes. Usually one log will be the perfect amount for my family, per meal. But, do what works for you. I like to pop a log out of the freezer before each meal.
Using a sharp knife, slice the logs into rounds, to your desired thickness (every family has its preferences!) Slicing the lukshen while the log is semi frozen is actually even easier. I like to place the lukshen in a dish once they’re cut and let them warm up a bit before serving. You can warm them up either by pouring some soup over them or by heating them in the oven for a few minutes.
Notes
When preparing crepes for a sweet blintz (such as cheese blintzes) use the same recipe and simply add about 2 tbsp of sugar to the batter.
Potato starch tends to sink through to the bottom, so every 15 minutes or so, while I’m busy frying the crepes, I like to re-blend the ingredients once again.