Baked Bleu Cheese Halibut

1/4 lb. blue cheese crumbles
1/2 qt. buttermilk
1 1/2 cups mayonnaise
1 cup water
1/2 tsp black pepper
1 tsp garlic, crushed
1/2 tsp white pepper

2 lbs. halibut, cut into 5 oz. pieces
1 red onion, sliced
blue cheese crumbles

Mix all dressing ingredients, add water to thin if needed. Chill.
( or use prepared blue cheese dressing of your choice ) Preheat
oven to 350.
In a large baking dish layer a thin amount of the blue cheese
dressing. Lay fish on top and add another layer of dressing on
top. Cover with sliced red onion and blue cheese crumbles.