Leek And Gruyere Frittata - cooking recipe

Ingredients

1 tablespoon unsalted butter
1 tablespoon extra virgin olive oil
1 large leek, washed and thinly sliced
coarse salt
fresh ground black pepper
6 large eggs
1/2 cup milk
2 ounces gruyere cheese, grated (about 1/3 cup)

Preparation

Preheat oven to 375 degrees F.
Heat buuter and oil in a 10 inch cast iron skillet over medium heat.
Saute leek slices until sft and barely browned. Season with salt and pepper.
Meanwhile, beat eggs and milk together in a mixing bowl. Pour over leeks and sprinkle with cheese. Let cook for about 5 minutes, until edges are just set. Stick in oven for 8 minutes. Frittata should be just set throughout.