Ingredients

  • 2 1 3/4-inch-thick slices challah bread from middle of loaf
  • 3 ounces grated Gruyere cheese (about 3/4 cup)
  • 1/4 small red onion, very thinly sliced
  • 2 large eggs, lightly beaten
  • 3/4 cup whole milk
  • 1/4 teaspoon kosher salt
  • 1/4 teaspoon ground black pepper
  • 2 tablespoons extra virgin olive oil
  • 1 small apple, cored, quartered and very thinly sliced
  • Fried eggs, for serving, optional

Method

  • Place one slice of bread on kitchen counter, the bottom crust nearest you.
  • Cut into bottom crust, parallel to counter, to make a pocket.
  • Do not cut all the way to top of slice; bread should remain attached there.
  • Tuck half the cheese and onion slices in pocket.
  • Repeat with other slice.
  • In a bowl, whisk together the eggs, milk, salt and pepper.
  • Pour custard into a wide, shallow dish.
  • Soak stuffed bread in custard, turning once halfway through, until most of the liquid has been absorbed, about 5 minutes.
  • Heat oil in a large skillet over medium heat.
  • Add half the apple slices in a single layer and cook for 1 minute.
  • Place bread slices in pan, covering apples.
  • Arrange remaining apple slices on top of bread; cook 1 minute more.
  • Reduce heat to medium low, cover and cook for 5 minutes.
  • Uncover and increase heat to medium; cook until bottoms are golden, about 2 minutes.
  • Carefully turn bread and apples and cook until bread is golden and cheese is melted, 3 to 5 minutes.
  • Serve topped with fried eggs if desired.