Preparation Mix soy sauce, sambal oelek, brown sugar, and fish sauce in a small bowl; set aside. Heat oil in a skillet over medium. Add scallions and garlic and cook, stirring occasionally, until softened (a little color is okay), about 3 minutes. Add chicken and lightly season with salt. Cook, breaking up with a wooden spoon and tossing occasionally, until chicken is cooked through, 5–7 minutes. Add reserved soy sauce mixture and cook, tossing occasionally, until liquid is almost completely reduced, about 2 minutes. Serve chicken mixture with lettuce, herbs, lime wedges, and more sambal oelek for making lettuce wraps.