In a large bowl, combine (with your hands or a spatula) the turkey, cheese, green onions, crushed pretzels, mustard, honey, mayonnaise, garlic, salt, and pepper.
Use a 1/2 cup measuring cup to measure/scoop out burgers.
Form into 1-inch thick patties.
Preheat the grill to 350-450 degrees. Oil the grill grates so the burgers don't stick. Place the burgers on the grill and cook 7 minutes per side. Melt cheese on top if desired the last 2 minutes of cooking. Serve on a bun with desired toppings.