Mix the Turkey Patties - In a large bowl, gently mix together the ground turkey, egg, bread crumbs, soy sauce, garlic, parsley, salt, pepper, onion powder, and paprika (if using). The mixture will be slightly tacky.
Form the Patties - Form into 4 even-sized rounds, about ¼ pound per patty. Press each patty down to a ½-inch thick by about 4 inches wide. Transfer to a plate or tray and freeze for at least 15 (20 mins. max), or refrigerate for 30 minutes.
Cook the Turkey Burgers - Heat a 12-inch cast iron skillet, grill pan, or nonstick pan over medium heat. Add the olive oil. Once hot, add the patties. Cook until golden brown, about 4 to 5 minutes. Flip and cook over medium-low heat until the internal temperature reaches 160 to 165ºF (71 to 74ºC) on a meat thermometer, about 5 to 7 minutes.If using cheese, add to the patties about 2 minutes before reaching the desired doneness and allow it to melt on top.
To Serve - Toast the burger buns, then add the patties and desired toppings.
