Ways to mix fish sauce in the North, the Middle and the South of Vietnam are different. In the North and the Middle, people use very little sugar to mix sauce. They usually use pure sauce with a little garlic and chili

2 tablespoons fish sauce
½ teaspoon minced garlic
½ teaspoon minced fresh chili
3 tablespoon sugar
1 teaspoon salt
1 cup vinegar
1 tablespoon lime juice
¼ carrot (shredded)
¼ daikon (shredded)

Combine carrot, daikon with salt. Leave 10 minutes to absorb, drain off water and squeeze to dry. Mix a tablespoon of sugar and 1 cup of vinegar, soak the carrot and daikon in vinegar for 30 minutes.

Combine fish sauce with 4 tablespoons of water and 2 tablespoons of sugar (optional). Bring to a boil. Leave until cool.

Add lime juice, minced garlic, minced fresh chili (optional). Pick the carrot and daikon up and add to the fish sauce. Season again to have a pleasant taste.