Pumpkin Beef Bolognese

Name: Pumpkin Beef Bolognese
Ingredients: 14 ounces pasta; 1.5 pounds ground beef; 4 cups diced pumpkin, with skin, seeded; 3 cups puréed tomatoes; 1 3/4 cups beef stock; 2 shallots, finely chopped; 3 garlic cloves, minced; 1/2 large fennel bulb, trimmed and diced; 1 celery rib, finely chopped; 3 tablespoons olive oil; 1 teaspoon each: dried thyme, dried sage, dried marjoram, smoked paprika, chili flakes; 1 bay leaf; 1 heaped tbsp tomato paste; sea salt + black pepper; fresh thyme + chili flakes, for serving