Serves 2

In my home, the kitchen, living room and outside space are joined together. Cooking is central to how I live and I find it interesting to see others when they're preparing food, dining and socialising at home. Architecturally, it's important - it brings people together. It provides a chance to sit and talk.

That said, I can't claim to be a brilliant cook. I'm not one who usually tends to follow recipes, but my mother wrote a cookbook that was never published, and this is one of hers. I just call it The Fish Recipe. It's dead easy and requires only a few simple ingredients. Whenever I'm stuck for something to cook friends, it's always reliable. At the last minute, I'll think, I know, I'll do The Fish Recipe.

You should seek out sustainable fish for this - try looking at for a list of good and bad species. I've just launched a cutting-edge environmental design firm called Ecocentric (, so in that spirit, please don't use over-fished varieties.

2 fillets of white fish that's sustainable (not cod - try pollack)
4tbsp mayonnaise
2tbsp natural yoghurt
1 onion
1 red pepper
Salt and pepper
A little butter

Preheat the oven to 180C/gas mark 4. Chop the onion and pepper mix them together with the mayonnaise, yoghurt and seasoning. Grease a baking dish with the butter and place the fish fillets in it. Cover with the yoghurt mixture and bake it for half an hour, until it's brown on top.

This is best served with garlic fried potatoes and petits pois, or maybe steamed broccoli.

Ecocentric is at the Ideal Home Show, Earls Court 2, London SW5, until tomorrow