Once spinach are thawed, squeeze excess water. Otherwise, you'll have a watery quiche.
Cook crust in the oven according to your crust recipe or crust package instructions. Set aside.
Now, set oven temperature to 325F.
In a skillet over medium low heat, melt butter and add shallots. Cook until very soft, about 6-8 minutes. Reserve.
In a medium bowl, whisk eggs. Then add cheese, cream, salt, pepper and nutmeg, and stir to combine.
Add shallots and thawed spinach on the pie crust, then slowly add the egg filling.
Bake in oven for about 50 t0 55 minutes or until cooked through.