Cook or steam spinach until wilted. Squeeze the spinach dry, or use a small mesh strainer to get the excess water out.
Put the cooked spinach, ground turkey, feta cheese, egg white, and a splash or two of Worcestershire sauce in a medium mixing bowl and mix/mash well. A meat or potato masher works well for this step.
Put ⅓ packed cup of the meat mixture on a hot and lightly oiled pan. Dust the top of the burger with garlic powder and cook for 4 minutes.
Using a small spatula, flip the burger over and cook for an additional 3-4 minutes, until the internal temperature reaches 165° F.
Notes
This recipe is easily doubled. If doubled, you can use one whole egg instead of two egg whites to minimize waste.Use feta that comes in a block because it is easier to mash into the turkey meat and will blend in nicely. Crumbled feta will not blend as well.Leftovers reheat well and are perfect for lunches, too!Cooking time will vary depending on how many burgers will fit on your pan at one time.Cooking tip: toss sliced onions and mushrooms on the pan while the burgers cook for a grilled veggie effect. They make excellent toppings! So does Avocado!