The first time I tried Halibut Olympia at a kid's birthday party in Anchor Point, AK I thought, "wow- halibut ice cream!?" Since then Halibut Olympia has become our go to for a tasty halibut dish when we're having company over.
Here's our personal variation that is hard to not have thirds! (For a lighter version either apply less sauce or choose non-fat sour cream and mayonnaise.)
2 tablespoons butter
Cut halibut into entree size portions - approximately 3x4 inches.
Melt butter in skillet and sauté onions until translucent. Add mushrooms and red pepper, sautéing until tender. Pour the saute into prepared baking dish and top with un-cooked arugula. Place halibut filets in single layer over top of onions.
For sauce, combine sour cream, mayonnaise, garlic powder, salt, pepper, basil and thyme. Taste and adjust seasonings to your liking.
Cover halibut with sauce and top with bread crumbs. Bake at 400°F for 20 minutes. Remove from oven and top with Parmesan and return to oven for 10 minutes or until golden brown.