Clean and slice the strawberries, In a blender or food processor add the sliced strawberries and the sugar and puree. Remove 1/2 a cup of puree and set aside.
In a cold bowl add the cream and beat until stiff peaks form. Then fold in the remaining puree (not the 1/2 cup) gently.
Divide the 1/2 cup of puree between the 4 small/medium** glasses and top with the strawberry mousse. Refrigerate for approximately 1 hour or even over night if desired. Top with fresh sliced strawberries and serve. Enjoy.
** for size purposes, the glasses I used hold 1 cup of water.
For anyone wanting to use this as a filling (eg pie or cake), this might help, whip the cream until soft peaks form, then in a small pot add 1 tablespoon of water and sprinkle the teaspoon of gelatine on top, let stand one minute, then place the pot on low heat and heat just until the gelatine has dissolved whisk until smooth, do not boil, then immediately remove from heat. Pour the gelatine (slightly cooled but not thickened if it does thicken too much then warm it up again) into the cream and continue to whip until firm peaks form, then continue with the recipe.