The simplest of ingredients come together in a dessert of supreme and elegant smoothness. Cook together cream, sugar, lemon zest, lemon juice, vanilla and gelatin, then finish with the all-important buttermilk for tang. Serve in attractive dessert dishes, or unmold from ramekins. Garnish with your choice of fresh fruit for a simply spectacular panna cotta presentation. Get the recipe for Chef John's Buttermilk Panna Cotta.