Combine the glaze ingredients in a small saucepan. Bring to a simmer, stirring, over high heat. Set aside to cool. In a medium bowl, combine the turkey, fresh coriander, peanut butter, fish sauce, chile sauce, lemongrass, citrus zests, lime juice, ginger, garlic, and salt. Mix with a fork until thoroughly combined. Form into 4 patties, each about 1/2-inch thick.
Heat a stove top grill pan or out-door grill to medium-high heat. Grill the burgers until just cooked through, about 4 1/2 minutes per side. Brush both sides with the glaze. Serve on a bun garnished with sprouts and scallions. Drizzle with more glaze if desired.
Substitute 2 teaspoons soy sauce for the fish sauce if necessary. If the Sriracha sauce is unavailable substitute 1/4-teaspoon hot sauce.
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