For the sauce, place the shallot in a pan along with the stock and the vermouth.
Bring to the boil and reduce by half.
Add the cream and season with salt and black pepper and lemon juice.
At the last minute, throw in the torn sorrel.
For the fish, in a non-stick pan, heat the clarified butter and the oil.
Sear the fish on one side for 3-4 minutes, then set aside.
When ready to serve, season the top side with salt and pepper.
Then flip the salmon and cook on the side for a few seconds over a medium heat.
To serve, place the sorrel sauce onto a plate and place the salmon on top.