In a large bowl, add the ground turkey, spinach, sun-dried tomatoes, red onion and feta. In a small bowl, whisk together the garlic, egg, olive oil and dried oregano and kosher salt and freshly ground black pepper then pour over the turkey and mix with your hands to combine.
Divide the burger mixture into 4 portions and mold into patties. Place on a cutting board or plate dividing the patties with parchment paper and refrigerated for 30 minutes up to overnight. You could also individually freeze the patties at this point for up to 3 months.
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