Preheat your oven to 350°F and lightly grease a 6-inch pie dish or springform pan.
In a small mixing bowl, combine the almond flour, egg white, dried oregano, and sea salt until a thick dough forms.
Press the dough evenly into the bottom and slightly up the sides of the prepared pie dish.
Bake the crust for 8-10 minutes until it is firm to the touch, then remove from the oven and set aside.
In a medium bowl, whisk together the eggs, cottage cheese, Greek yogurt, minced garlic, and black pepper until well combined.
Roughly chop the fresh spinach and fold it into the egg mixture along with the crumbled feta cheese.
Pour the cheese and egg filling into the par-baked crust, smoothing the top with a spatula.
Bake for 30-35 minutes or until the center is set and the top is lightly browned.
Allow the pie to cool for at least 5 minutes before slicing into wedges and serving.