To prepare a vichyssoise with sour cream and chives 4966 recipe, first you will need to gather your ingredients. First, you'll need the following ingredients: Sour cream: 2 tbsp., 1 cup (240 ml) granulated sugar (optional) 1 tablespoon kosher salt 1 teaspoon thyme. Finely chop the garlic and add it to the mixture. Next, add the remaining ingredients and mix them together until the ingredients are well combined. If you don't have finely chopped garlic, then you can use fresh garlic. You can also use dried garlic if you prefer. Salt and pepper to taste. To serve, place the dish in the refrigerator and let it chill for at least 1 hour before serving.