01 - In a large bowl, gently combine ground turkey, chopped onion, minced garlic, parsley, Worcestershire sauce, smoked paprika, salt, and black pepper until just mixed; avoid overmixing.
02 - Form the mixture into four even patties, slightly larger than the buns to account for shrinkage during cooking.
03 - Heat a grill or skillet over medium-high heat and lightly oil the surface to prevent sticking.
04 - Grill the patties for 5 to 6 minutes on each side until golden brown and the internal temperature reaches 165°F (74°C).
05 - Place a slice of cheddar cheese on each patty during the last minute of cooking and cover to melt thoroughly.
06 - Lightly toast the burger buns on the grill or in a toaster until golden and crisp.
07 - Spread mayonnaise or burger sauce on the bottom bun, layer lettuce, a cheese-topped patty, tomato slices, red onion, and optional sauces; finish with the top bun.
08 - Present immediately alongside preferred sides such as sweet potato fries or a green salad.