- Heat grill to HIGH heat. 
- In a large bowl, combine ground turkey and grated Gruyere cheese using a fork. 
- Add scallions, breadcrumbs, Dijon mustard, and minced garlic to the turkey mixture. 
- Season generously with salt and pepper. 
- Gently form the mixture into 4 patties, approximately 1 inch thick. 
- Lightly oil the grill grates with olive oil. 
- Place patties on the hottest part of the grill and sear for 1-2 minutes on each side until browned. 
- Move patties to a cooler section of the grill and continue cooking for 5-10 minutes per side until cooked through. 
- Grill buns lightly if desired. 
- Serve on buns with lettuce, tomato, and pickles.