Thaw the frozen spinach and drain some of the extra water

In a large bowl, mix together the ground turkey, spinach, sun dried tomatoes, garlic, oregano, and the egg

Pour the oats into a food processor and pulse a few times until the oats are fine and the consistency of bread crumbs

Mix the oats in with the burger mixture

Using your hands, form the mixture into burger sized patties (should be enough for about 6 burgers)

Heat half the olive oil in a skillet or grill over medium high

Cook until the burger is well done and the turkey is no longer pink inside

Meanwhile, slice the halloumi cheese into 6 thick slices

Heat the other half of the olive oil in another skillet or on the grill over medium high

Place the halloumi cheese slices on the skillet or grill, cook on one side until golden brown, flip and cook the other side until golden brown

Serve the burger patties on the buns and top with fried/grilled halloumi cheese, arugula, and tzatziki

Serve and enjoy!