In a small bowl, combine the fresh raspberries, sugar, and lemon juice. Gently mash the raspberries with a fork to release their juices, then set aside to marinate for about 10 minutes.
In a large mixing bowl, beat the softened cream cheese with powdered sugar and vanilla extract until smooth and creamy.
Add the zest of one lemon to the cream cheese mixture and mix until fully incorporated.
In another bowl, whip the heavy cream until stiff peaks form. Carefully fold the whipped cream into the cream cheese mixture until well blended.
Gently fold in the marinated raspberries, making sure to leave some chunks for texture.
Spoon the mousse mixture into serving glasses or bowls.
Chill in the refrigerator for at least 2 hours to firm up before serving.
Notes
Before serving, top with a few whole raspberries and a small mint leaf for a pop of color. Optionally, drizzle with honey for added sweetness.