In a large skillet over medium heat, add the olive oil. Once hot, add the chopped spinach and sauté for about 2-3 minutes until wilted.
In a mixing bowl, combine the sautéed spinach, feta cheese, mozzarella cheese, garlic powder, onion powder, salt, and pepper. Mix well until all ingredients are evenly combined.
Place one tortilla in the skillet over medium heat. Spoon the filling onto one side of the tortilla, then fold it over into a half-moon shape.
Cook for about 3-4 minutes on each side, or until the tortilla is golden brown and the cheese is melted. Repeat with the remaining tortillas and filling.
Once cooked, remove from the skillet and let cool for a minute before slicing into wedges. Serve with sour cream or salsa if desired.