Quiche Lorraine

Ingredients

• Tart Shell:
• 1⅓ cups AP flour
• 1⅔ tablespoon cornstarch
• 1/4 tsp salt
• 6 tablespoons butter, diced
• 1 egg
• Filling:
• 1¾ cups diced leeks (2 large leeks)
• ¾ cup diced onion
• 2½ teaspoons olive oil
• 3 eggs
• ½ cup heavy cream plus 1 tablespoon
• 1⅛ cup sour cream
• pinch nutmeg
• pinch salt
• pinch pepper
• 1½ cups ham, diced (about ½ pound)
• ¾ cups Swiss cheese, grated