Preheat oven to 425 degrees. In a large ziplock bag, soak fish in milk for 20-30 minutes.
In a small bowl combine mayonnaise, cilantro, mustard, lemon peel, salt and pepper; mix well.
Place halibut fillets in a lightly greased 13 x 9 x 2 inch baking dish.
Evenly spread mayonnaise mixture over fillets, then top with crushed corn flakes.
Cook in oven for 15 minutes or until fish flakes easily with a fork.
