Chicken and Sweet Potato Casserole

Ingredients

• • 1 tablespoon (15 ml) olive oil
  • 4 carrots, thinly sliced
  • 1 large red bell pepper, thinly sliced
  • 1 leek, thinly sliced
  • 2 1/2 cups (625 ml) cooked chicken, finely chopped
  • Salt and pepper

• Sauce

  • 3 tablespoons (45 ml) butter
  • 3 tablespoons (45 ml) flour
  • 2 cups (500 ml) chicken broth

• Topping

  • 2 cups (500 ml) peeled and grated sweet potatoes (about 1)
  • 2 cups (500 ml) shredded mozzarella cheese
  • Salt and pepper