Ingredients

  • 4 tablespoons olive oil, plus more for greasing
  • 2/3 cup breadcrumbs
  • Kosher salt and freshly ground black pepper
  • 4 boneless, skinless chicken breasts (about 2 pounds)
  • 4 heads broccoli, cut into florets (about 6 cups)
  • 2 cups grated Parmesan
  • 1/4 cup unsalted butter
  • 1/2 cup all-purpose flour
  • 1/4 teaspoon freshly grated nutmeg
  • Pinch cayenne pepper
  • 3 cups milk
  • 2 cups shredded sharp Cheddar
  • 1 cup chicken stock
  • 1/2 cup dry white wine
  • 1/2 teaspoon paprika

Method

  • Preheat the oven to 350 degrees F and place a rack in the top third of the oven.
  • Grease a 9-by-13-inch baking dish with some olive oil and set aside.
  • In a medium bowl add the breadcrumbs and the olive oil.
  • Season with salt and pepper and set aside.
  • Place the chicken in a large pot and cover with water.
  • Add 4 teaspoons salt and bring to a boil, then immediately reduce to a low simmer.
  • Cook the chicken until the internal temperature on an instant read thermometer reads 160 degrees F, 15 to 20 minutes.
  • Remove and cool slightly, then slice the chicken into thin strips or shred, and place in the bottom of the prepared dish.
  • Add the broccoli and sprinkle the Parmesan over the top.
  • Melt the butter in a medium saucepan set over medium heat.
  • Add the flour and use a wooden spoon or whisk to stir until smooth and cooked, 4 to 5 minutes.
  • Add the nutmeg, and cayenne.
  • Slowly whisk in the milk, Cheddar, stock and wine.
  • Bring to a boil, whisking often.
  • Reduce to a simmer and cook until thickened and smooth, 5 to 8 minutes.
  • Pour the sauce over the broccoli and chicken and then top with the breadcrumb mixture and sprinkle the paprika over the top.
  • Cover the dish with foil and bake 15 minutes.
  • Remove the foil and bake until the top is golden and the casserole is bubbling, 15 minutes.
  • Cool for about 5 minutes and then serve.