First prepare the herb butter.
For the garlic-herb butter, peel and press the garlic. Chop the herbs into small pieces. Mix soft butter with herbs, garlic and salt well. Wrap the butter into a roll in plastic wrap. Refrigerate for about 30 minutes.
Blanch the vegetables briefly, then toss in butter in a pan.
For the pike-perch fillet, wash the fish, sprinkle with lemon juice and season with salt and pepper. Fry the fish in a little oil on both sides for about 3 minutes.
Arrange and serve.