Step: 1/13

Peel the carrot, celery and leek and cut into fine strips.

Step: 2/13

Preheat the oven to 220°C (200°C fan, gas 7). Prepare all the ingredients.

Step: 3/13

Pat dry the fish fillet.

Step: 4/13

Spread out the vegetables in a shallow baking dish.

Step: 5/13

Add the wine.

Step: 6/13

Dot with the butter.

Step: 7/13

Cut the fish fillet into 4 equal pieces.

Step: 8/13

Place on the vegetable bed.

Step: 9/13

Season with salt and pepper.

Step: 10/13

Cover with foil. Cook in the oven for 15-20 minutes.

Step: 11/13

Remove from the oven and remove the foil.

Step: 12/13

Season the vegetables and serve with the fish on plates. Top with lemon slices.

Step: 13/13

Spoon the sauce around the fish. Serve with chips and asparagus if desired.