Prepare the Mixture:

In a large mixing bowl, combine the ground turkey, thawed and drained spinach, crumbled feta cheese, eggs, minced garlic, and dry ranch seasoning.

If using, add chopped red onion and Kalamata olives for extra flavor.

Mix until all ingredients are thoroughly incorporated.

Form the Patties:

Divide the mixture into equal portions and shape into patties of your desired size.

Cook the Burgers:

Grilling: Preheat your grill to medium heat. Place the patties on the grill and cook for about 5-7 minutes per side, or until the internal temperature reaches 165°F (74°C).

Stovetop: Heat a skillet over medium heat. Add a small amount of oil to the pan, then cook the patties for 5-7 minutes per side, ensuring they reach an internal temperature of 165°F (74°C).

Serve:

Serve the turkey burgers on buns with your choice of toppings, such as lettuce, tomato, red onion, or additional feta cheese.