OR THE SAUCE
1/3 cup fish sauce (nam pla)
1/3 cup water or low-sodium chicken broth
2 tablespoons low-sodium soy sauce
1 1/2 tablespoons sugar
2 teaspoons Thai chili sauce, or more to taste
1 teaspoon finely minced garlic
1 teaspoon finely minced ginger root
FOR THE CHICKEN (or beef)
2 large egg whites
2 tablespoons cornstarch
1/4 to 1/2 cup plus 1 tablespoon vegetable oil
Ground white pepper
1 pound boneless, skinless chicken breast halves, thinly sliced
1 large white onion, thinly sliced
1 cup packed Thai basil leaves
2 to 3 Thai chile pepper (may substitute 1 small jalapeño chile pepper), stemmed, seeded and thinly sliced
For the sauce: Combine the ingredients in a medium bowl and set aside.
For the chicken: In a medium bowl, combine the egg whites, cornstarch, 1 tablespoon of the oil and the white pepper. Add the chicken and mix well; set aside.
Heat a wok or skillet over high heat. Add the remaining 1/4 to 1/2 cup oil and add the chicken mixture; stir-fry for 4 to 5 minutes. Add the onion and stir-fry for a few minutes; the onion will not soften thoroughly. Add the sauce, stir for 1 minute and turn off the heat. Add the basil and chili pepper, stirring to combine. Transfer to a platter and serve immediately.
This makes plenty of sauce and can be served with noodles.