Let’s dive into the step-by-step process to make this delightful quiche:

1. Preheat your oven to 375°F (190°C) and grease a 9-inch pie dish lightly with olive oil.
2. Heat the olive oil in a skillet over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.
3. Add the spinach to the skillet and cook until wilted, about 2-3 minutes. Remove from heat and set aside.
4. In a large mixing bowl, whisk together the eggs, milk, salt, pepper, and nutmeg until well combined.
5. Stir in the sautéed onion and spinach mixture, followed by the crumbled feta cheese.
6. Pour the mixture into the prepared pie dish, spreading it evenly.
7. Bake in the preheated oven for 30-35 minutes, or until the quiche is set and the top is lightly golden.
8. Let it cool for a few minutes before slicing and serving.

Cooking with love and patience was something my grandmother always emphasized, and it’s reflected in the care taken with each step of this recipe.