There is much to love about this classic Tuscan onion soup, in which blanched, then sauteed, onions team with browned prosciutto and sausage to make a flavorful, white wine-inflected broth. After simmering, the soup can be served as is or blended until smooth, and it's ladled atop slices of toasted bread and garnished with Parmesan. A few turns of cracked black pepper and a whirl of olive oil would be solid additions, too.