Remove the steaks from the fridge about 15-20 minutes before cooking.
Preheat oven to 180C. Line a baking tray with non-stick baking paper. Place the salt, celery, chilli and fennel seeds on the prepared tray. Bake for 12-15 minutes or until the salt mixture is light golden and celery dry. Cool on tray. Transfer to a bowl.
Meanwhile, preheat a char-grill to hot. Pull back the husks on corn, but do not remove. Brush corn cobbs with the butter, then sprinkle with chives. Season. Cover the cobbs with their husks again and twist at the ends. Char-grill or barbecue for 8-10 minutes, turning occasionally. Transfer to a heatproof plate.
Season the steaks with a little of the chilli and celery salt mixture. Cook steaks on same char-grill for 3-4 minutes each side for medium or cook until your liking. Transfer to serving plates and cover loosely with foil. Allow to rest for 5 minutes.
Serve the steak and corn with extra chilli and celery salt to season.
Use different spices in the sea salt mixture before baking such as coriander seeds, cumin seed or yellow mustard seeds.