You can freeze the meaty sauce without pasta in it and reheat it later for a future meal. If you want to freeze it with the pasta, make sure that the pasta used is slightly underdone so that when the dish is reheated the pasta doesn’t end up overcooked. Make sure to thaw the sauce in the fridge overnight before using. If kept in an airtight container the alfredo sauce or pasta can last up to 3 months in the freezer.