Usually, I find turkey burgers to be dry and not very appetizing. However, the addition of some sauces makes for some interestingly flavored burgers. So far I've been most successful using Trader Joe's Soyaki sauce. I've been hunting around for a recipe to make a homemade equivalent, probably involving teriyaki sauce, soy sauce, and ginger but I've been unsuccessful.
1/2 lb Ground Turkey
1 tbsp Ketchup
4 tbsp Trader Joe's Soyaki Sauce
1. Dice the shallot and mix with the turkey, ketchup, and soyaki sauce.
2. Divide the mix into eight equal portions. Roll the portions into balls and then press into patties.
3. Grill burgers over high heat. Because turkey is rather dry, try to sear the outside of the burgers to trap some of the soyaki inside.
4. Serve like a normal burger. Because of the soyaki sauce, I like to add a fair bit of sriracha to the normal condiments.
As I mentioned, I'm still working out a more homemade version of the soyaki sauce. I've been making these on the stovetop for now, but I think it will translate easily to the BBQ. Ground turkey is a nice vector for interesting flavors, so I'll probably experiment a bit more. At some point I'll probably switch the recipe around and add the sriracha to the burgers and use the soyaki as the condiment.