Buttermilk Panna Cotta

I adapted this recipe from a pastry-chef friend. (Thanks, ML!) We served it successfully with a variety of accompaniments, ranging from cornbread fried in butter, to a mélange of fresh peas, pea leaves, celery hearts, celery leaves, chervil, and mint oil, in another homage to a dish they serve at Noma. (Thanks, Chef René!) This is the quintessential MSF dessert, because it’s inexpensive, simple, versatile, and seems s