01 - In a large bowl, combine ground turkey, onion, garlic, parsley, Worcestershire sauce, smoked paprika, salt, and black pepper. Mix gently until just combined, avoiding overmixing.
02 - Form the mixture into 4 even patties, slightly larger than the buns to account for shrinkage during cooking.
03 - Preheat grill or skillet over medium-high heat and lightly oil the surface.
04 - Cook patties for 5 to 6 minutes per side until internal temperature reaches 165°F and patties develop a golden-brown crust.
05 - During the last minute of cooking, place a slice of cheddar on each patty and cover to melt thoroughly.
06 - Lightly toast burger buns on the grill or in a toaster until golden.
07 - Spread mayonnaise or burger sauce on bottom bun, layer lettuce, a turkey patty with melted cheese, tomato slices, red onion, and optional sauces. Top with upper bun.
08 - Serve immediately with preferred side dishes.