Wash the pollack, divide into portions, season and fry in a mixture of oil and butter for about 5 minutes on each side.
Sauté the onions and curry in butter (do not brown), add the fish stock and reduce to a little less than half. Add the whipped cream and apple, bring the sauce to the boil and simmer for about 5 minutes. Season to taste with salt and pepper, possibly thicken the cornstarch mixed with a little water.
Serve pollack with curry cream sauce. Garnish the cream sauce with a little chives and parsley.
In addition, steamed vegetables such as B. zucchini, carrots, broccoli are enough.