Pappardelle with Ham and Radicchio Ragù

Ingredients

• • 1 onion, chopped
  • 1 carrot, cut into small dice
  • 1 celery stalk, cut into small dice
  • 2 garlic cloves, chopped
  • 2 tbsp (30 ml) olive oil
  • 2 tbsp (30 ml) tomato paste
  • 1/4 tsp red pepper flakes
  • 3 cups (750 ml) mustard-glazed roasted ham broth or chicken broth
  • 2 2/3 cups (450 g) mustard-glazed roasted ham, cut into large dice (see note)
  • 1 small radicchio, cored, finely chopped
  • 3/4 lb (340 g) pappardelle
  • 3/4 cup (55 g) fresh Parmesan cheese, finely grated, plus more for serving