In a blender or food processor, combine the cottage cheese, fresh raspberries, honey (or maple syrup), vanilla extract, and lemon juice. Blend until smooth and creamy.
In a separate bowl, whip the heavy cream until soft peaks form. If desired, add powdered sugar for extra sweetness.
Gently fold the whipped cream into the raspberry-cottage cheese mixture until well combined. Be careful not to deflate the whipped cream.
Spoon the mousse into serving dishes or cups and refrigerate for at least 1 hour to chill and set.
Before serving, top with additional fresh raspberries for garnish.