First, boil the water then put the noodles in and stir them around until the noodles are soft and cooked. Pour the water out and put the noodles in a bowl to let it cool down.
Then put all of the ingredients in a bowl and pour in the fish sauce and the sugar. Mix it together. Then take the lemons and squeeze them over the bowl.
Add the noodles and mix together and then taste it. When you have the taste that you want you can serve it. You can serve it with plain rice or only with the noodles. It's up to you. Enjoy!