Grate Parmesan cheese
In one bowl, mix Parmesan cheese and Hellmann's mayonnaise. In the other, add the Panko bread crumbs.
Remove the skin from the halibut, and if it's thick, slice lengthwise so that it's no more than 1cm thick.
Add to first bowl, and spread with mayo mixture.
Add to bread crumbs, and gently pat down so that it is completely covered.
Add to a non-stick fry pan (or you can bake). Flip when it's golden and cook through.
Serve with Asparagus and lemon wedges.