Cut 4 larger pieces of aluminum foil and coat with half of the oil. Place each fish fillet on a separate oiled piece of foil, sprinkle with Vegeta and lemon juice and then coat with some more oil. Wrap the fish in the foil and bake in the oven heated up to 180°C for 10-15 minutes.
As a side dish, clean the vegetables and cut it into thin strips.
In a larger pan heat up the oil and sauté shortly. Add Vegeta and fry all together for about 2 minutes.
For the sauce, on 20 g of butter shortly fry finely chopped onions. Add orange juice, grated orange peel and Vegeta. Cook mixing for 3-4 minutes and add cornstarch diluted with water. Remove from fire and gradually stir in the remaining butter in the hot sauce.
Take the fried fish fillets from the foil, put on heated plates and serve with vegetable side dish and orange sauce.
Chopped vegetables as a side dish you can place under the fish and bake all together in an aluminum foil at 180°C for about 20 minutes.