Can I use sweet Italian sausage instead of hot?
Yes. Sweet sausage works well; you'll lose the heat but keep the richness. Adjust red pepper flakes if you want spice.
What can I substitute for heavy cream?
Use half-and-half, whole milk mixed with cream cheese, or sour cream stirred in at the end (don't boil after adding sour cream).
Can I make this ahead?
Yes. Prepare the sauce, cool, and refrigerate up to 2 days. Reheat gently over low heat, then cook fresh pasta and toss together.
How do I prevent the cream from breaking?
Keep heat at medium or medium-low when adding cream, and stir constantly. Avoid boiling once cream is in.
Can I use a different pasta shape?
Absolutely. Penne, rigatoni, or tagliatelle all work; fettuccine's width clings well to this creamy sauce.