Halibut Casserole - cooking recipe

Ingredients

4 medium potatoes (unpeeled)
1 - 1 1/2 lb halibut
1 teaspoon salt
pepper
1/2 teaspoon sage
3 tablespoons butter
3 tablespoons flour
1 1/2 cups milk
1 lemon, juice and zest of
1/2 cup sour cream (I use low fat)
1/3 cup grated cheddar cheese

Preparation

Boil potatoes till done.
Peel and slice thinly.
Spread in the bottom of a 1 1/2 quart casserole that has been lightly treated with cooking spray.
Place Halibut in a saucepan with salt, pepper and sage.
Cover with boiling water. Simmer on medium 15 minutes.
Drain break in pieces and spread over potatoes.
Melt butter in a small saucepan.
Stir in flour and cook and stir a minute till flour looses its rawness.
Gradually whisk in milk (it must boil to thicken ).
When sauce has thickened add lemon juice, zest and sour cream, mix well.
Pour over fish and top with grated cheese.
Bake at 375\u00b0 10 - 15 minutes.