Step 1

Preheat oven to 375°F (190°C).

Step 2

Roll out the pie crust and press it into a 9-inch quiche dish or pie plate. Prick the bottom with a fork. Pre-bake the crust for 8 minutes. Remove from oven.

Step 3

In a skillet, heat olive oil over medium heat. Add the onion and sauté until translucent, about 5 minutes. Add the spinach and cook until wilted, about 2 minutes. Remove from heat and let cool.

Step 4

In a large bowl, mix together the ricotta cheese, eggs, heavy cream, Parmesan cheese, salt, pepper, and nutmeg until well combined. Stir in the cooled spinach and onion mixture.

Step 5

Pour the filling into the pre-baked crust. Bake for 35-40 minutes, or until the quiche is set and the top is golden brown.

Step 6

Let the quiche cool for a few minutes before slicing. Serve warm or at room temperature.