01 - In a large bowl, gently mix ground turkey, finely chopped onion, minced garlic, chopped parsley, Worcestershire sauce, smoked paprika, salt, and black pepper until just combined; avoid overmixing.
02 - Shape the mixture into four even patties, slightly larger than the burger buns to account for shrinkage during cooking.
03 - Preheat a grill or skillet over medium-high heat and lightly oil the surface to prevent sticking.
04 - Cook each patty for 5 to 6 minutes per side until golden brown and internal temperature reaches 165°F.
05 - Place a slice of cheddar cheese on each patty during the last minute of cooking and cover to melt thoroughly.
06 - Toast the whole-wheat burger buns on the grill or in a toaster until lightly golden.
07 - Spread mayonnaise or burger sauce on the bottom bun, layer with lettuce, a turkey patty topped with melted cheese, tomato slices, red onion, and optional sauces; finish with the top bun.
08 - Serve immediately alongside preferred side dishes.