Pollock can be watery but I find it makes fantastic fish pie.
Poach fish in milk ( I like to add chopped garlic, wild garlic at this time of year is out so use that instead)
Once fish is pretty much cooked through, drain the fishy milk and use it to make a cheese sauce. (PM me if you need a good CS recipe) Shove fish + sauce in a casserole dish, add some veg (Anything really) peas, sweetcorn, spinach, few chunks of carrot or whatever you like. Top with mashed potato and bake in oven until the top is brown, add a little grated cheese and fresh parsley and bingo. fit for a king.