Satay Turkey Burgers with Lemongrass and Ginger

Name: Satay Turkey Burgers with Lemongrass and Ginger
Ingredients: 2 tablespoons soy sauce; 2 1/2 teaspoons dry mustard; 2 tablespoons kecap manis (available at Asian groceries); 2 teaspoons honey; 1 pound ground turkey; 2 tablespoons finely chopped fresh coriander (cilantro); 2 teaspoons natural creamy peanut butter, room temperature; 2 teaspoons Thai fish sauce (available at Asian groceries) see note; 1/2 teaspoon Thai Sriracha chile sauce (available at Asian groceries) see note; 1/2 teaspoon minced lemongrass (optional); 1/4 teaspoon grated lemon zest; 1/4 teaspoon grated lime zest; 1 teaspoon freshly squeezed lime juice; 1/4 teaspoon freshly grated peeled ginger; 1 small clove garlic, minced and mashed to a paste with 1/8 teaspoon kosher salt; 1/2 teaspoon kosher salt; 4 hamburger buns, toasted; Mung bean, alfalfa, radish sprouts, or pea shoots; Sliced scallions