Add the cream cheese, heavy whipping cream, confectioners sugar substitute, vanilla extract and xanthan gum to a mixing bowl, and blend on high until smooth and stiff peaks form.

Spread the vanilla mixture evenly into a loaf pan.

Place the mashed strawberries into a blender or food processor with the granulated sweetener and blend until combined.

Spread the strawberry mixture over the top of the vanilla ice cream mixture in the loaf pan, and use a butter knife to drag and swirl the strawberry mixture into the vanilla.

Place the ice cream into the freezer to set for a minimum of four hours before serving.