Preheat your oven to 375°F (190°C) and lightly grease a small oven-safe baking dish.
In a non-stick skillet over medium heat, add the olive oil and ground turkey, breaking it apart with a spatula until fully browned.
Add the fresh spinach to the skillet and sauté for 1-2 minutes until just wilted, then remove from heat to cool slightly.
In a medium mixing bowl, whisk together the egg, Greek yogurt, crumbled feta cheese, sea salt, black pepper, garlic powder, and dried oregano.
Fold the cooked turkey and spinach into the yogurt mixture until well combined.
Lay one sheet of phyllo dough into the bottom of the baking dish, folding the edges inward to fit the base.
Spread the turkey and spinach mixture evenly over the bottom phyllo sheet.
Top with the second sheet of phyllo dough, gently scrunching it with your fingers to create a textured, ruffled surface.
Bake for 20-25 minutes until the phyllo is deeply golden brown and the filling is set.
Let the bake rest for 5 minutes before slicing and serving.