Frying is one of the most simple ways of preparing fish. Take the fish, fry it on the both sides for few minutes, serve warm and eat. And that is all :o)
Note: Using non-stick frying pans is very common these days, but be careful, they like medium to low heat. Also, if you use olive oil for frying (non-stick or ordinary pans), use low to medium heat, too. Just like non-stick pans, olive oil don't like heat very much - it will not become poisonous, but it will lose much of it's taste and fragrance.
Fried hake fillets is very simple pan fried hake recipe. Just take hake fillets, add some spices, fry them and meal is ready. As a side dish, you can have potato salad or mixed vegetables with some whole grain bread...