How to Make Panna Cotta:

1. In a medium saucepan, combine 1 cup of milk and sprinkle 1 packet of gelatin on top. Allow it to sit for 3-5 minutes until the gelatin softens. Heat the pan over medium-low, stirring until the gelatin fully dissolves and the mixture is steaming, which should take about 4-5 minutes (avoid boiling).
2. Incorporate 2 cups of heavy whipping cream, 1/2 cup + 1 Tbsp of sugar, 1 tsp of vanilla, and a pinch of salt. Keep stirring for approximately 5 minutes until the sugar dissolves completely and the mixture is steaming (do not let it boil). Remove from heat and let it cool for 5 minutes.
3. Transfer the sour cream to a medium bowl with a pouring lip. While whisking continuously, slowly mix in the warm cream. Once the mixture is smooth, strain it through a fine mesh sieve if desired, then quickly pour it into 6 glass cups or 8 ramekins. Chill in the refrigerator until fully set, which takes about 4 to 6 hours.

How to Make Berry Sauce:

1. In a small saucepan, mix 1 cup of berries, 1/2 Tbsp of lemon juice, and 1/4 cup of sugar. Bring it to a gentle boil and simmer for 4-5 minutes until it becomes syrupy.
2. Add the remaining 1 cup of fresh berries and take it off the heat. Once the syrup has cooled to room temperature or is slightly warm, drizzle it over the chilled panna cottas.