1 can Cream of Mushroom Soup
1/2 can Water
1/2 package Onion Soup Mix
1/2 cup Butter
Milk to soak the halibut
Place the halibut in a flat dish and pour the milk over the halibut. Soak for 2 hours. Drain thoroughly. Place the halibut in a baking dish.
Preheat the oven to 350 degrees.
In a medium sized saucepan, combine the soup, water, onion soup mix and butter. Mix together and heat until just boiling.
Pour the soup mixture over the halibut and bake for 20-30 minutes, until the halibut is flaky when tested with a fork.