Wash the plaice fillets, dab dry and cut in half lengthwise. Peel garlic and press it through a garlic press. Mix with lemon juice, 1 tablespoon soy sauce and a little salt. Brush the fish fillets with the marinade and keep covered and cool.
In the meantime clean and wash the peppers and courgettes. Cut the peppers lengthwise into pieces, cut the zucchini into thick slices. Heat the oil in a pan and fry the peppers for 6-8 minutes, turning.
Finally add the zucchini and fry for about 2 minutes. Season with salt. Crumble white bread coarsely. Cut the chillies lengthwise, remove the seeds and chop the pods finely. Mix eggs with chilli, remaining soy sauce and some salt.
Put the vegetables in a greased baking dish and spread the marinated plaice fillets on top. Pour over the egg and sprinkle with white bread and butter in flakes. Bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for 25-30 minutes.
Serve garnished with parsley.