In a mixer, whip the mousse and milk on high speed until the mouse is thickened. Finely chop 4 of the strawberries, and add them to the mousse. Blend for 1 more minute and refrigerate for a least an hour.
Spoon mousse mixture into a piping bag. Pipe the cannoli shells full of the mousse. Make a design on the serving plate with the chocolate syrup. Slice the remaining strawberries, and place around the plate with the blackberries. Place the cannolis in the middle of the plate. Garnish with powdered sugar.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.