Curried Red Snapper

1 1/2 pounds fresh or frozen red snapper*
2 medium onions, chopped
2 celery ribs, chopped
1 tablespoon butter or margarine
1 teaspoon curry powder
3/4 teaspoon salt
1/4 cup milk

Preheat oven to 350 degrees F.

Place the fish in a greased 13 x 9-inch baking dish.

In a skillet, saut