1/2 cup butter
3 cloves garlic, chopped
1 small onion, chopped
1 (10 oz) package frozen chopped spinach, thawed and drained
1 (6 oz) package herb and garlic feta, crumbled
1 (8 oz) package shredded cheddar cheese
salt and pepper to taste
1 (9 inch) unbaked deep dish pie crust
4 eggs, beaten
1 cup milk
Preheat oven to 375ºF.
In a medium skillet melt butter over medium heat. Saute garlic and onion in butter until lightly browned, about 7 minutes. Stir in spinach, feta and 1/2 cup cheddar cheese. Season with salt and pepper. Spoon mixture into pie crust.
In a medium bowl, whisk together eggs and milk. Season with salt and pepper. Pour into the pie crust, allowing the egg mixture to thoroughly combine with the spinach cheese mixture.
Bake in preheated oven for 15 minutes. Sprinkle top with remaining cheddar cheese and bake an additional 35-40 minutes, until set in center. Allow to stand 10 minutes before serving.
Serve room temperature or chilled.