01 - Combine cranberries, orange juice, sugar, orange zest, and salt in a small saucepan. Simmer over medium heat for 8 to 10 minutes, stirring occasionally, until cranberries burst and sauce thickens. Remove from heat and let cool.
02 - In a large bowl, combine ground turkey, chopped onion, minced garlic, parsley, egg, breadcrumbs, Dijon mustard, salt, and black pepper. Mix gently until just combined to avoid dense patties.
03 - Divide mixture into four equal parts and shape each into a round patty.
04 - Heat olive oil over medium heat in a skillet. Cook patties for 5 to 6 minutes per side until golden and cooked through (internal temperature 165°F).
05 - Optionally, lightly toast burger buns to enhance texture and flavor.
06 - Place lettuce on bottom bun halves, top with turkey patty, spoon cranberry sauce over, add red onion slices, and cover with top bun.
07 - Serve immediately to enjoy the warm patties with tangy cranberry sauce.