Rigatoni with Pumpkin and Bacon

Name: Rigatoni with Pumpkin and Bacon
Ingredients: Coarse salt; 8 slices bacon, coarsely chopped; 1 medium onion, halved and thinly sliced; 1 sugar pumpkin (about 3 pounds), peeled and halved, seeds removed, and flesh cut into 3/4-inch cubes; 1 tablespoon finely chopped fresh sage; 1/4 teaspoon allspice; 1 1/2 cups homemade or low-sodium store-bought chicken stock; 3 tablespoons heavy cream; Freshly ground pepper; 1 pound rigatoni; 1/2 cup finely grated Parmesan cheese, plus more for serving; 2 tablespoons hulled raw pepitas (pumpkin seeds), toasted, for garnish