Turkey Burgers

INGREDIENTS

• 2 Tbs. white peppercorns, toasted
• 2 Tbs. fennel seeds, toasted
• 2 Tbs. coriander seeds, toasted
• 1 Tbs. fresh rosemary, chopped
• 1 Tbs. fresh sage, chopped
• 1 Tbs. fresh thyme, chopped
• 16 Tbs. (2 sticks) unsalted butter, at room temperature
• 1 Tbs. granulated garlic
• Zest and juice of 1 lemon
• 1 tsp. coarse salt
• 1 1/2 lb. ground turkey
• Salt and freshly ground black pepper, to taste
• 1/4 cup chicken stock, or as needed
• Vegetable oil for grill
• 6 sandwich rolls such as seeded Kaiser, ciabatta or brioche, split, or white bread slices, cut into rounds using a large biscuit cutter
• Melted unsalted butter for brushing
• 1/2 iceberg or romaine lettuce head, shredded
• Dill pickle slices for serving
• Chutney for serving (optional)
• Basic barbecue sauce for serving (see related recipe at left; optional)