Jack Kennedy's Fettucine

I have no idea where I got this recipe but I know I've had it for a long while now.
A favorite of President John F. Kennedy

• 1 tablespoon  butter
• 1 lb fettuccine pasta     
•  1/3 cup onion
• 1 cup chicken stock
• 1/2 cup whipping cream
• a cup of sour cream
• 2 tablespoons chopped chives  
• 1/3 cup finest parmesan cheese

 Here are the directions:

1 Parmigiano reggiano cheese finely grated.
2  cook fettucine for 8 to 10 minutes al dente. Drain well.
3 Now, in another pan melt butter on medium heat. Add onion and cook, stirring often, for 3 minutes or until softened and transparent.
4 Stir in chicken stock and bring to a boil; simmer for 5 minutes . You want to reduced it slightly.
5 Whisk in the cream and cook for 30 seconds. Remove from heat.
6 Add cooked noodles and sour cream; toss to combine well.
7 Season with salt and pepper to taste.
8 Transfer to a deep platter. Sprinkle the chopped chives over the top and sprinkle with a ton of  cheese.