Sprinkle the chicken tenderloin with a generous amount of salt and gently rub the salt into the chicken to clean the chicken. Rinse the salt off with warm water then pat the chicken dry using paper towels.
Place the dry pieces of chicken tenderloin in another bowl.
Gather up the chopped shallots, garlic, salt, pepper, lemongrass, sugar, soy sauce, chili garlic sauce, fish sauce and lemon juice.
In a separate bowl, combine the chopped shallots and garlic, salt, pepper, lemongrass, sugar, soy sauce, chili garlic sauce, fish sauce and lemon juice. Mix well.
Pour the marinade onto the chicken tenderloin. Mix well to make sure all the chicken tenderloin pieces are covered in the marinade.
Place plastic wrap over the bowl and place the bowl in the fridge for at least 1 hour. Overnight if possible.