01 - In a large bowl, combine ground turkey, onion, garlic, parsley, Worcestershire sauce, smoked paprika, salt, and black pepper. Mix gently until just combined to avoid toughening the meat.
02 - Shape the mixture into 4 even patties, slightly larger than the buns as they will shrink during cooking.
03 - Preheat a grill or skillet to medium-high heat and lightly oil the surface to prevent sticking.
04 - Cook patties for 5 to 6 minutes on each side, or until the internal temperature reaches 165°F (74°C) and the patties are golden brown.
05 - During the final minute of cooking, place a slice of cheddar cheese on each patty and cover to melt the cheese thoroughly.
06 - Toast the burger buns on the grill or in a toaster until lightly golden.
07 - Spread mayonnaise or burger sauce on the bottom buns, layer with lettuce, a turkey patty with melted cheese, tomato slices, red onion, and optional condiments. Finish with the top bun.
08 - Serve immediately accompanied by your preferred side dish.