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 sweetness.
Gently fold the whipped cream into the raspberry mixture until fully combined, being careful not to deflate the whipped cream.
Spoon the mousse into serving dishes or glasses and refrigerate for at least 1 hour to allow it to set.
Before serving, top with additional fresh raspberries and a drizzle of honey if desired.