- 1.8kg/4lb sea bass, cleaned and scaled
- 1 lemon, thickly sliced
- freshly ground black pepper
- 100ml/3½fl oz olive oil
- leaves from small bunch of thyme
- 1 small bunch of rosemary, chopped
- 750g/1lb 10oz coarse sea salt
- 1 lemon, grated zest only
- 1 tsp chilli flakes
- 1 free-range egg white, lightly beaten
- melted butter and lemon wedges, to serve
- 1 tbsp white wine vinegar
- 1 tbsp of water
- 3 free-range egg yolks beaten with 2 tbsp water
- 225g/8oz unsalted butter cut in tiny pieces, or melted and left to cool until just warm
- 15g/1oz unsalted butter
- 225g/8oz sorrel, washed
- Preheat the oven to 220C/450F/Gas 7. Lightly oil a deep-sided roasting tin.
- Fill the belly cavity of the fish with the lemon slices and season inside with freshly ground black pepper.
- In a bowl, mix the herbs with the sea salt, lemon zest, chilli flakes and beaten egg white.
- Place one third of the salt mixture in the roasting tin and place the fish on top. Completely cover the fish with the rest of the salt mixture.
- Place the salt-covered fish in the oven and bake for 35-40 minutes.
- Meanwhile, make the hollandaise. In a small saucepan combine the white wine vinegar with the tablespoon of water and cook until it reduces down to one teaspoon in volume.
- Allow to cool then add the beaten egg yolks and whisk continuously over a low heat. Once cooked, the eggs in your hollandaise should be smooth and velvety rather than granular. When the texture is right you can very gradually incorporate the butter, a little at a time.
- Whisk vigorously while adding the butter. If it gets too thick add a few drops of warm water. Once all the butter has been incorporated, season to taste and keep warm. Do not let it get too hot as the sauce will split.
- For the sorrel, melt the unsalted butter in a shallow pan until hot and foaming. Add the sorrel leaves and heat gently until the leaves have wilted.
- Remove from the heat and roughly chop the sorrel leaves. Stir the sorrel into the warmed hollandaise.
- When the fish is cooked, remove from the oven. Carefully crack open the salt case and remove the fish.
- Serve on a large dish with the sorrel hollandaise.