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. Set aside to cool.
02 - In a large bowl, mix ground turkey, onion, garlic, parsley, egg, breadcrumbs, Dijon mustard, salt, and black pepper until just combined. Avoid overmixing to maintain tenderness.
03 - Divide mixture into 4 equal portions and shape each into a patty.
04 - Heat olive oil in a skillet over medium heat. Cook patties for 5 to 6 minutes per side until golden brown and internal temperature reaches 165°F.
05 - Lightly toast burger buns if preferred.
06 - Place lettuce on bottom bun half, add turkey patty, spoon cranberry sauce over, top with red onion slices, then cover with the top bun.
07 - Serve immediately for best flavor and texture.