Creamy Sausage Pasta With Cabbage

Name: Creamy Sausage Pasta With Cabbage
Ingredients: 2 tablespoons olive oil, plus more as needed; 1 pound sweet Italian sausage (about 4 to 6 sausages depending on size), uncased; 1 big pinch of kosher salt, plus 1 1/2 teaspoons, plus more as needed; 1/2 large head of green cabbage, cored and cut in two pieces, then sliced into roughly 1 1/2-inch ribbons (this will yield about 5 to 6 cups); 3/4 pound conchiglie (small shell) dried pasta; 1/8 teaspoon ground nutmeg; 1 cup heavy cream; 1/4 teaspoon freshly ground black pepper, plus more to taste; 4 ounces Parmesan, Microplaned or very finely grated, divided in two (each will be about 1/2 cup packed)