Turkey burgers are a cooking artists dream. Ground turkey by itself does not have tons of flavor so it can be a lot of fun adding flavors that really bring out the best in the turkey.
The other side of turkey is it can dry out very easily. A trick I learned from watching my wife is to add some water to your pan after you get a nice crust on the burger and cover. It basically gives the burger a quick braise, absorbing the liquid and keeping it nice and juicy.
Enjoy!
