1. Panna Cotta:
2. Soak the gelatin in cold water to soften it.
3. Pour the milk into a medium saucepan. Split the vanilla bean, scrape out the seeds, and add them to the milk. Heat gently.
4. Add the mascarpone. Mix well to "melt" the mascarpone.
5. Add the sugar and vanilla extract to taste. Heat and stop just before boiling.
6. Add the gelatin and mix.
7. Let the mixture "infuse" for a good 5 minutes.
8. Pour into glasses or ramekins (preferably transparent) and let set in the fridge.
9. Coulis:
10. Let the fruits release their juice with lemon and sugar, then blend to obtain a coulis.
11. Serving:
12. At the time of serving, you can unmold the Panna cotta (by dipping the ramekin in hot water for a few seconds) and pour the coulis on top, or simply add the coulis to the glass.
13. Enjoy your meal!