For the pasta and sausage
01 -
12 oz (340 g) medium pasta shells
02 -
1 tablespoon olive oil
03 -
1 lb (450 g) sweet or hot Italian sausage, casings removed
04 -
1/2 teaspoon kosher salt, plus more for pasta water
05 -
1/2 teaspoon black pepper
For the peppers and sauce
06 -
2 large bell peppers, red, yellow, or orange, diced
07 -
1 medium yellow onion, diced
08 -
4 cloves garlic, minced
09 -
1/4 teaspoon crushed red pepper flakes, optional
10 -
6 oz (170 g) cream cheese, cubed and softened
11 -
1/2 cup (120 ml) half-and-half or heavy cream
12 -
1/2 cup (50 g) finely grated Parmesan cheese, plus more for serving
13 -
1 to 1 1/2 cups (240 to 360 ml) reserved pasta water
14 -
3 cups (85 g) baby spinach
15 -
2 tablespoons chopped parsley, optional