In pot wide enough to hold corncobs, combine milk, stock, corn kernels and cobs, and sage. Season with sea salt and pepper, and bring to a simmer. Cook for 10 minutes, then remove from heat. Keep covered and let rest for 10 minutes.
Meanwhile, in large pot, heat 2 tablespoons olive oil over medium heat. Add onion, fennel seeds and ground coriander. Cook for 2 minutes, stirring occasionally, until soft but not browned. Add leek and celery, and cook for 5 more minutes, stirring occasionally. Add diced fennel and continue cooking for 5 minutes, stirring occasionally. Add milk and corn mixture (with corncobs still in) and bay leaves. Simmer soup, covered for 15 minutes, or until vegetables are soft. Discard corncobs and bay leaves.
Transfer soup to bowl of food processor, a few cups at a time, and purée until smooth. To serve, ladle soup into bowls. Add a few steamed clams and slices of chorizo. Drizzle with Parsley Oil and finish with chopped parsley and a bit of chopped fennel fronds.
Note: In addition to using it as a garnish for the soup, this is a great vinaigrette and as a garnish for risotto or fish.
• 2 c. packed parsley leaves