Preheat your oven to 375°F (190°C) and lightly coat a small individual baking dish with a touch of olive oil.
In a skillet over medium heat, sauté the fresh spinach with the olive oil until completely wilted, then remove from heat and let cool slightly.
In a medium mixing bowl, whisk together the eggs, liquid egg whites, and Greek yogurt until the mixture is smooth and well combined.
Stir in the crumbled feta cheese, chopped fresh dill, sliced green onion, sea salt, and black pepper.
Squeeze any excess moisture from the cooked spinach and fold it into the egg mixture.
Layer the two sheets of phyllo dough into the baking dish, allowing the edges to hang over the sides.
Pour the spinach and egg filling into the center of the phyllo dough.
Gently fold the overhanging phyllo edges back over the filling to create a rustic crust.
Bake for 25 to 30 minutes until the egg filling is set and the phyllo pastry is deep golden brown and crispy.