Prepare individual heart silicon moulds or use a small loaf tin, or even a 20- 23 cm (8-10 inch) cake tin or heart mould. A removable base is best but if the tin is well lined with paper it will slide out easily.
Melt the chocolate gently in a bowl over a double boiler ( or for 1-1/2 minutes in a microwave till just melted. Set aside without letting it get cold
Meanwhile beat the cream till soft and firm and set aside in the fridge).
In a clean bowl of a mixer, add the eggs, sugar and rose water and beat till very white and light and moussey. ( it will almost look like whipped cream). Now this is the important bit mix it together like this.
Put 1/4 of the egg mix into the still warm chocolate and fold gently but rapidly till incorporated. Add half of the rest of the egg mix folding through, and then the remainder and fold through, gently but firmly until the mouse looks like a nice smooth dark mixture.
Now for the cream . Add 1/4 of the cream to the chocolate mixing straight away,(folding lightly and quickly why?, because the cream is cold and the mousse is blood temp). When the first cream is mixed in, put 1/2 of the remainder and repeat, following with the last bit, all the while folding. Finished.!
Spoon into your mould. Wrap or cover and freeze, overnight. This mouse can be eaten just chilled if you like