Laura Finke on Instagram: "Deep Dish Quiche Lorraine 🥧 Ingredients 1 3⁄4 cups all-purpose flour 1⁄2 teaspoon salt 12 tablespoons (1 1⁄2 sticks) unsalted butter, cut into small cubes and chilled 3 tablespoons sour cream 4-6 tablespoons ice water 1 large egg white, lightly beaten (save the yolk for filling) 2-inch deep cake pan or deep dish quiche pan (This recipe will NOT fit in a pie plate.) 8 slices thick-cut bacon, cut into small pieces 1 medium onion, chopped fine 1 1⁄2 tablespoons cornstarc