Preheat oven to 350 degrees F. Lightly grease a 10x15-inch baking dish.
In a medium bowl, add 1 egg white; beat lightly. Stir together the chopped hazelnuts, 1 tablespoon bread crumbs, parsley, pepper, salt, orange zest, and vermouth; set aside.
Place remaining bread crumbs on a large plate suitable for dredging. In a shallow pan or pie plate, lightly beat remaining egg whites and milk together. Place halibut filets, one at a time, into egg whites to coat well, then press each side of the filets into bread crumb mixture to coat well.
Lay prepared filets well apart on the prepared baking dish; crumble the hazelnut mixture over the top of each.
In a small bowl, combine melted butter and white wine; drizzle over top of the filets.
Preheat your barbecue grill.
Cover barbecue with lid, open any vents, and grill the prepared halibut 8 to 12 minutes, uncovered, or until a meat thermometer registers an internal temperature of 140 degrees F (halibut will be slightly opaque in thickest part). Remember the halibut continues to cook after it is removed from the heat source.
Approximately cooking times for halibut:
1/4 to 1/3-inch - 3 to 4 minutes
1/2 to 3/4-inch - 4 to 6 minutes
1 to 1 1/2-inch - 8 to 12 minutes
This is the type of cooking and meat thermometer that I prefer and use in my cooking. I get many readers asking what cooking/meat thermometer that I prefer and use in my cooking and baking. I, personally, use the Thermapen Thermometer shown in the photo on the right. To learn more about this excellent thermometer and to also purchase one (if you desire), just click on the underlined: Thermapen Thermometer.
Carefully remove halibut from pan and transfer onto individual serving plates. Serve with lemon wedges.
Makes 4 servings.