Preheat your grill or skillet over medium heat.

In a bowl, combine ground turkey, chopped spinach, crumbled feta, garlic powder, onion powder, salt, and pepper. Mix gently until just combined.

Form the mixture into four equal patties, about 1 inch thick. Make an indent in the center of each patty to prevent puffing.

Brush each side lightly with olive oil. Grill or pan-fry for about 5-7 minutes per side until cooked through (internal temperature reaches 165°F).

Serve on toasted buns with desired toppings like lettuce and tomato.