Seriously - ours are as simple as that. Sometimes I add worcestershire sauce, sometimes I baste 'em with barbecue sauce (not often because of the sugar). Sometimes, if the turkey is super lean, I'll mix in an egg just to hold everything together.
Garlic
onions
green peppers
mushrooms, need these for moisture
2 % cheese
Salt and Pepper
Sometimes minced bacon
Sometimes Montrel Chicken Seasoning or Rotisserie Chicken Seasoning, but omit the salt
Sometimes salsa
I've even added some brown rice
Mix it all up and put in the frig or freezer for a little while, because kind of soft.
Pop it in the Rocket Grill 8 minutes or panni grill, don't know how long. Have it with lettuce, lite mayo, and dill pickles. Even my "I hate your food" grandson eats them. Don't overcook or they dry out.
I made turkey burgers last night which turned out FANTASTIC. I added finely chopped red onion, rosemary, ginger, sesame oil, and sesame seeds. Sometimes I'll do onion, rosemary, and worcestershire sauce. Sometimes I add oats or cracker crumbs and egg. It's pretty versatile, play around with it!