Heat a large skillet over medium-high heat and add 1 tablespoon oil. Once oil is hot, but not smoking, stir in the ground turkey and sugar (if using). Let it cook, undisturbed, for 2-3 minutes. Using a spatula or wooden spoon, start to break up the meat and continue cooking for about 5-6 minutes or until meat is very crumbly and no longer pink.
Shove the turkey to one side of the pan and add the remaining 1 tablespoon oil to the empty side. Tumble in the chopped green beans over the oil and cook for about 3-4 minutes, stirring occasionally and leaving them on the side that has no meat as much as possible.
Add the garlic and scallions to the beans, cook for about 30 seconds then stir everything to combine the bean mixture with the turkey meat. Cook for 2 minutes more, or until beans have softened enough to have a pleasant bite (they will still be crunchy).
Add the soy sauce, chili paste, fish sauce (if using), and all the herbs. Stir briefly to combine. Taste and sprinkle with more soy sauce or chilli paste, if needed.
Top with extra herbs and scallions. Serve with rice and lime wedges on the side, if desired.
Notes
Chili sauce – Sambal Oelek adds loads of flavor and a nice kick. You can use any other chili paste you prefer. If you don't like any heat, use just a teaspoon or any similar chili sauce that has less spice such as a chili garlic sauce. This is not supposed to be a saucy dish. If you want it slightly saucier, you can try mixing 1/4 cup water, 1/4 cup rice wine vinegar, a splash more soy sauce and 1 tablespoon cornstarch. Stir it into the dish once it has been removed from heat. Store: Transfer any leftovers to an airtight container and refrigerate for up to 3-4 days.