After three attempts, I mastered Halibut Olympia.
Preheat 375
Melt butter in bottom of pyrex dish. Put in lots of onions. Cut fresh halibut in 3/4-1" strips. Pat as dry as you can. Put two strips of hali on onions. Salt & Pepper
Cover with a 50-50 mix of Mayo and Sour Creme.
Bake 20 minutes. Pull out, put on lots of grated cheddar cheese. Bake 3 more minutes.
It's really good. My first two attempts I didn't pat dry and cut my pieces too thick resulting in too much halibut and not enough goop.
Tomorrow I will try mixing some hot sauce in the the mayo/sour cream mixture. I've got a good hunk of halibut in fridge I am working on.
