Leek Potato Soup

INGREDIENTS

• 1 cup buttermilk
• Heavy pinch kosher salt, plus additional for seasoning
• 1/2 teaspoon white pepper
• 1 tablespoon snipped chives
• 1 quart vegetable broth
• 1 cup heavy cream
• 3 tablespoons unsalted butter
• 14 ounces, approximately 3 small, Yukon gold potatoes, peeled and diced small
• 1 pound leeks, cleaned and dark green sections removed, approximately 4 to 5 medium