Ingredients

• 1 pound ground turkey
• ½ cup fresh spinach leaves, chopped
• ⅓ cup sun-dried tomatoes, chopped
• ¼ cup red onion, minced
• ¼ cup feta cheese, crumbled
• 2 cloves garlic, pressed or minced
• 1 egg, whisked
• 1 tablespoon olive oil
• 1 teaspoon dried oregano
• ½ teaspoon kosher salt
• ½ teaspoon freshly ground black pepper
• 4 soft whole-wheat hamburger buns
• Bibb lettuce leaves
• Sliced red onion

• ½ English cucumber, grated on the large side of a box grater (about 1 cup)
• 1 cup plain Greek yogurt (I use 2%)
• 1 medium clove of garlic, grated or minced (about ½ teaspoon)
• 1 tablespoon apple cider vinegar
• 1 tablespoon fresh dill, minced
• ¼ teaspoon kosher salt
• ⅛ teaspoon freshly ground black pepper

Instructions

1. Place the ground turkey, chopped spinach, sun-dried tomatoes, red onion, and feta cheese into a large mixing bowl. In a separate small bowl, whisk together the garlic, egg, olive oil, dried oregano, kosher salt, and freshly ground black pepper. Pour this mixture over the turkey mixture and gently combine using your hands until everything is evenly incorporated.
2. Separate the mixture into four equal portions and shape into patties. Arrange them on a plate or cutting board with parchment paper between each patty. Refrigerate for 30 minutes or up to overnight. At this stage, the patties may also be frozen individually for up to 3 months.
3. To prepare the tzatziki, gather the grated cucumber in a paper towel and squeeze out as much liquid as possible. Transfer the cucumber to a medium bowl and add the yogurt, garlic, apple cider vinegar, fresh dill, salt, and freshly ground black pepper. Stir until well blended. Cover and refrigerate for at least 30 minutes or up to 3 days.
4. Preheat a non-stick grill pan over medium heat and coat it generously with cooking spray. Add the turkey patties to the pan, cover with an inverted sheet pan or lid, and cook for approximately 5 minutes per side. Keep an eye on the heat level, as turkey burgers can brown quickly if the pan is too hot.
5. Spread tzatziki sauce onto the buns and top with lettuce leaves and sliced red onion before adding the burgers. Alternatively, skip the buns and serve the burgers wrapped in Bibb lettuce leaves.