Preheat the oven at 200°C.
In a bowl combine onion, garlic, Vegeta Delight stock, olive oil, hot pepper and mix well.
Clean and scale the fish then wash thoroughly and tap dry using paper towel. Fill the fish with the some of the dressing. Spread the rest of the dressing on the oven proof dish and place the fish over.
In a pan heat up olive oil and fry the onion rings.
Arrange the potato, celery and fried onion rings around the fish. Decorate with the lemon slices and add water. Bake in the oven for about 30 minutes.
This dish is best served hot.
Cut the vegetables into smaller pieces so it can cook quicker.