Fileti oslića u umaku od vina is a traditional dish originating from Istria. The dish is usually made with a combination of hake, flour, butter, oil, white wine, heavy cream, parsley, salt, and black pepper. The hake fillets are seasoned with salt and pepper, and dredged in flour.

The fillets are fried in a mixture of hot butter and oil until golden. The pan juices are mixed with white wine, heavy cream, and parsley in order to make a sauce. The sauce is poured over the fish fillets, and the dish is then typically served with mashed potatoes on the side.