Soak the gelatine in cold water. Heat the milk in a pot and dissolve the squeezed gelatine in it while stirring. Remove the pot from the heat and stir in the bottle of Chiefs Protein Drink Strawberry. Allow the mixture to cool in a cold water bath while stirring. When the mixture begins to set, beat the egg whites with erythritol until stiff. Fold the egg white mixture into the stiffening mixture. Pour the mousse into small bowls and leave to set overnight in the refrigerator.

Puree half of the strawberries and pass them through a sieve. Chop the other half into halves or quarters. Serve the mousse with the pureed and chopped-up strawberries.