Spinach Onion Quiche

1 frozen pie crust, thawed

1 onion, sliced
2 tablespoons butter
1 tablespoon all purpose flour
1 package frozen chopped spinach, thawed and well drained
1 teaspoon salt
1 teaspoon pepper
1/4 teaspoon nutmeg
1 teaspoon dried oregano
1 1/3 cups half and half
3 large eggs

Preheat oven to 450°F. Bake the empty pie crust for 10 minutes. Reduce oven temperature to 375°F

Saute onion in butter until translucent. Stir in the flour and cook for another minute. Combine onions and spinach in a large bowl. Season with salt, pepper, nutmeg and oregano.

Beat together half and half, eggs. Add to spinach and onion mixture. Stir well then pour into crust. Bake until filling is slightly puffed and top is golden, about 50 minutes. Let cool slightly before serving warm.