Combine the egg yolks, 1 tablespoon water, and half the sugar in a second metal bowl and whisk over the double boiler set over medium heat. (Do not allow any additional water to splash into this bowl.) Continue to whisk and insert a candy thermometer into the mix. When it reaches 145 degrees F, remove from the heat and whip with an electric mixer until it cools. Set aside briefly.
Wash and dry the beaters for the electric mixer and wipe off the candy thermometer to have them clean for the next step. In the third metal bowl, combine the egg whites with the remaining 1/8 cup sugar and whisk over the double boiler until the candy thermometer reaches 145 degrees F. Then, remove from the heat and beat with the electric mixer until the whites are stiff.
For the toppings and garnish:
Use an electric mixer to beat the heavy cream until whipped. Slice each strawberry up to the stem and spread into a fan. Garnish chilled mousse with whipped cream and strawberries just before serving.