01 - In a mixing bowl, combine ground turkey, finely chopped onion, minced garlic, chopped parsley, Dijon mustard, salt, and black pepper. Mix gently until just combined; avoid overworking the mixture.
02 - Divide the mixture into four equal portions and shape each into a patty slightly larger than the burger buns.
03 - Heat olive oil in a large skillet or grill pan over medium heat. Place patties in the pan and cook for 5 to 6 minutes per side, until golden brown and cooked through (internal temperature should reach 165°F).
04 - In the last two minutes of cooking, top each patty with slices of Brie. Cover the pan or loosely tent with foil to allow the cheese to melt.
05 - Toast the burger buns until golden brown.
06 - Place a handful of arugula or baby spinach on the bottom half of each bun. Add a turkey patty topped with melted Brie, then spoon over cranberry sauce. Finish with the top bun.
07 - Serve immediately while warm.