1 pound penne rigate
2 tablespoons extra-virgin olive oil
12 ounces spicy Italian sausage (about 4 links), casings removed
2 shallots, diced
2 cup frozen corn, thawed
1/2 teaspoon kosher salt, plus for the pasta water
8 ounces mascarpone, room temperature
1 tablespoon Calabrian chile paste
1 cup freshly grated Parmigiano Reggiano, plus for serving
1/4 cup fresh basil leaves, chopped