White Pasta Sauce with Fennel and Celeriac

Ingredients

• • 1 celeriac, about 1 lb (450 g) peeled and cubed
  • 1 fennel bulb, cubed, fronds reserved for serving
  • 2 onions, cubed
  • 6 garlic cloves, halved
  • 1 package (175 g) mortadella or sliced bacon
  • 1/2 cup (125 ml) olive oil
  • 4.4 lb (2 kg) lean ground pork or ground veal
  • 1 tbsp rosemary leaves, finely chopped
  • 1 tbsp dried oregano
  • 1 tbsp ground fennel seeds
  • 2 tsp red pepper flakes
  • 1 cup (250 ml) white wine
  • 8 cups (2 litres) chicken broth
  • 1 cup (250 ml) 35% cream