In a large mixing bowl, gently combine the ground turkey, finely chopped onion, minced garlic, fresh parsley, Worcestershire sauce, Dijon mustard, salt, black pepper, and optional smoked paprika. Use your hands to mix until just combined, taking care not to overmix.

Divide the mixture into four equal portions to form patties, about 1-inch thick, with a slight indentation in the center of each patty.

Preheat your grill or skillet to medium-high heat (around 375°F/190°C). Add a light drizzle of oil if using a skillet.

Carefully place the patties on the hot grill or skillet, cooking for 5-7 minutes on each side until golden brown. Use an instant-read thermometer to check that the internal temperature reaches at least 165°F (74°C).

If adding cheese, place a slice on each patty during the last minute of cooking and cover to help melt.

Toast the burger buns on the grill or in a toaster until lightly golden.

Assemble your turkey burger by placing a patty on each bun, layering fresh lettuce, tomatoes, and any condiments of your choice.

Serve immediately while hot. Pair with sides like sweet potato fries or salad.