Slice the garlic thinly. Marinate the pikeperch with a little lemon juice and garlic.
Heat 1 tablespoon butter fat in a pan, add rosemary, sage and thyme. Fry the pikeperch fillet on the skin side first, turn it over and add the garlic. At the very end, add 1 tablespoon of butter, season with salt and freshly ground pepper and serve immediately.
This goes well with salad or fried fennel slices with lime oil (see recipe search).