Clean and wash the zucchini and cut them diagonally into thin slices. Mix olive oil and pesto. Pour into a flat casserole dish. Rinse fillets cold and dab dry. Cut into 4-8 larger portion pieces. Season with salt and pepper and place in an ovenproof dish.
Spread zucchini slices on the fish. Add butter as flakes. Sprinkle with sesame seeds and crushed pink berries and bake in a preheated oven (electric range: 200 °C/ gas: level 3) for approx. 25 minutes. Sprinkle with fresh basil leaves shortly before serving. Boiled potatoes taste good with it