Raspberry Tiramisu

1. **Prepare the Raspberry Sauce:**

- In a medium saucepan, combine the raspberries, sugar, and lemon juice. Cook over medium heat, stirring occasionally, until the raspberries break down and the mixture thickens slightly (about 10 minutes).

- Remove from heat and let it cool. If desired, strain through a fine mesh sieve to remove the seeds.

2. **Prepare the Cream Filling:**

- In a large mixing bowl, whip the heavy cream until soft peaks form.

- In a separate bowl, combine the mascarpone cheese, powdered sugar, and vanilla extract. Mix until smooth.

- Gently fold the whipped cream into the mascarpone mixture until fully combined.

3. **Assemble the Tiramisu:**