This is an adaptation of too many recipes to reference here. I used several as guides, but ultimately made some arbitrary changes both for my heart health's sake (for example, using a cup of butter felt excessive even with a full box of fettuccine) and for my own tastes. I so wanted to make this the authentic Italian way, but North America's love for cream (and my love for garlic!) won out. As always, do as you feel led if you give this a try!