Heat oven to 200C. Cut about 400g fresh salmon into small cubes and place in a blender. Add an egg yolk, 200ml single cream and a little salt free butter (room temp - not straight from fridge). Season and blend til smooth. Divide mix into 4 into pre-greased ramekins and place in a baking tray with water half way up sides of ramekins.
Place baking tray in oven and bake for about 15 - 20 mins. Tset if done by putting a metal skewer into the mousse - if it comes out clean they are ready.
Serve with a light dressing like a tomato concasse and have a herb salad. Add a little chilli powder or paprika to the salmon if you like.