Chicken Lasagna with Celeriac Béchamel

Ingredients

• Celeriac Béchamel

  • 6 tbsp (85 g) butter, softened
  • 1/4 cup (40 g) unbleached all-purpose flour
  • 1 onion, chopped
  • 2 garlic cloves, chopped
  • 4 cups (660 g) celeriac, peeled and diced
  • 3 cups (750 ml) milk
  • 3 cups (750 ml) chicken broth

• Lasagna

  • 2 carrots, chopped
  • 2 celery stalks, chopped
  • 1 leek, chopped
  • 2.2 lb (1 kg) ground chicken
  • 1/4 cup (55 g) butter
  • 3/4 cup (180 ml) white wine
  • 1/2 tsp red pepper flakes
  • 1 pinch ground nutmeg
  • 1 cup (70 g) Parmesan cheese, freshly grated
  • 2 cups (200 g) mozzarella cheese, grated
  • 12 to 15 lasagna noodles (see note)