The fish are kept in the dark side of the tail over the fire. When the skin is separated, come off with a knife, grabs a towel and pulled. Similarly, download and white skin. Cut heads, cleaned guts, fins are cut back, cut the spine in the middle and the meat is cut into 4 portions. Spread baking dish with butter, put half of the mushrooms and 1 onion, cut into pieces, add the washed and dried portions of fish, pour the wine and broth (or water), place the other half mushrooms and onions, previously cut into pieces and fried in butter, dusted with breadcrumbs, add salt, sprinkle with pepper, pour heated with butter and bake in low oven for about 15 minutes. The fish is served immediately. Suitable side dish cooked potatoes. Similarly may be prepared other fish - such as mackerel, pike, etc.