Preheat the grill to medium-high heat. In a large bowl, combine ground turkey, bread crumbs, egg, chopped onion, garlic powder, salt, and black pepper. Mix until well combined.

Divide the mixture into 4 equal portions and shape each into a patty.

Grill the patties for 6-8 minutes per side or until cooked through and internal temperature reaches 165°F.

Serve the turkey burgers on buns with desired toppings.