Rinse and pat dry your halibut steaks with paper towels. Whisk together the flour and pepper. Dredge the fish steaks through the flour until coated completely.
Melt the butter in a frying pan and add in the halibut steaks. You can sprinkle on some more pepper at this point, some salt, season it up a bit. Cook on a medium heat so the butter doesn't burn. The steaks should take about 6 minutes per side on a medium heat and when they are done the halibut will flake nicely.
While the steaks are cooking, start the sauce. In another small skillet, start the butter melting and add the minced garlic.
In the small skillet with the butter and garlic, add in the lemon juice, parsley, capers, wine and zest. Simmer it a while until the liquid is reduced.
To serve, place the fish steak on the plate and drizzle the sauce, making sure to get some of the lovely tidbits that are in the sauce on the fish.
For calorie information please note that the calculator assumes that you are eating ALL of the flour, the butter and the wine. Calories on this recipe are far less than the calculator tells you, as you only eat a small amount of each of those.