Rinse the halibut steaks and pat dry. Season with salt and pepper, then dust with flour.
Melt the butter in a large skillet over medium-high heat. Fry the halibut steaks in the butter for 4 to 5 minutes, until nicely browned. Remove from the skillet and keep warm.
Reduce the heat to medium, and stir the wine into the pan, scraping up any browned bits stuck to the bottom. Mix in the lemon juice, then stir in the cream. Simmer for 2 to 3 minutes or until it starts to thicken. Season with parsley, basil, lemon zest and capers, and stir for another minute. Serve halibut with sauce spooned over it. Garnish with additional parsley if desired.
Serve with sauteed spinach, rice pilaf and garlic crostini.