Mix softened Cream Cheese and Mayonnaise until well combined.
Drain canned Tuna very well. Chop up Onion finely. Add to the Cream Cheese mixture and mix well.
Cut off the both ends of Baguette and cut in half or about 20cm in length. Remove the soft inner bread.
Break the removed soft bread into small pieces, and mix with the cream cheese mixture.
Fill up the hollow with the mixture and wrap with plastic food wrap. Freeze for a few hours or until the filling is firm enough to slice.
Cut the half frozen stuffed Baguette into 1cm thick, arrange on a platter, sprinkle some freshly ground Black Pepper on each piece. Serve when they are thawed.
