In a bowl combine mascarpone cheese, sugar and chocolate liqueur. Mix well. Transfer to a piping bag or a resealable plastic bag with the corner snipped off.
Cut the tops off the strawberries so that they sit flat. Cut a crisscross in the bottom of the strawberry going about 3/4 of the way through. Be careful not to cut through the strawberry.
Pipe the mascarpone filling into the strawberries until all strawberries are filled. Top with chocolate shavings.
Chill until ready to serve.
If the mascarpone gets too soft, refrigerate until it firms up a bit. These can be made a day in advance if needed. Just store in an airtight container in the refrigerator.Recipe can easily be doubled! Nutrition information for estimation purposes only.