Potato salad with Cream

I got this recipe from a friend. It is soooo good. I highly recommend it and give it 5 stars!!! It's so good.

2 1/2 lbs potatoes
1/2 C vinegar,boiling
4 eggs,beaten(I just used 3)
1 tbsp butter
1C heavy cream(I used half and half)
4tbsp chopped fresh parsley
half chopped onion
2tsp dry mustard
1tsp salt
1/2tsp black pepper
1 pinch red pepper

Peel potatoes and boil in water til tender. OR for a fast way, wash red potatoes, steam in microwave til tender. Drain, and let cool.

In a double boiler, bring vinegar to a boil. Beat the eggs. Then once the vinegar is boiling, temper the eggs. Then pour in tempered eggs into the rest of the boiling vinegar. Cover and let simmer til thickened, occasionally stir to prevent scorched eggs. Stir in Butter,and cook one minute. Whisk in cream,parsley,onion,mustard,salt,pepper,and red pepper.Pour over potatoes and combine.Cool and sprinkle w/Parsley(or bacon bits) and refrigerate til ready to serve.