Kosher salt and freshly cracked black pepper to taste
1/4cuphalf and half or heavy cream
2cupsshredded mozzarella, divided
fresh basil, for garnish
Preheat oven to 350° In a large oven-safe skillet over medium-high heat, cook sausage, breaking up with a wooden spoon, until seared and no longer pink, about 4 minutes. Add onion, and garlic, and cook, stirring, until soft, 5 minutes more.
Add pasta, tomato sauce and season with salt. Stir in half-and-half and simmer until mostly absorbed, 2 minutes more. Remove from heat and stir in half of mozzarella.
Transfer mixture to a large baking dish and sprinkle with remaining mozzarella. Bake until cheese is bubbly and golden, about 10 minutes.