01 -
Microwave semisweet chocolate in a small heatproof bowl in 30-second increments, stirring between each, until melted and smooth, about 90 seconds total. Allow to cool slightly.
02 -
Process cottage cheese in a food processor or blender until smooth. Add melted chocolate and optional sweetener, blending until fully incorporated. Taste and adjust sweetness if necessary. Scrape sides and bottom to ensure even mixing.
03 -
Transfer mixture to an airtight container and refrigerate for at least 1 hour up to 3 days to develop texture and flavor.
04 -
Serve chilled mousse topped with additional chopped chocolate and fresh berries if desired.