Step 1: Bloom the Gelatin: Sprinkle gelatin over cold water and let it sit for 5 minutes to bloom completely.
Step 2: Prepare the Cream Mixture: In a saucepan, combine cream, milk, and sugar. Heat over medium flame until steaming but not boiling.
Step 3: Add Flavorings: Stir in pistachios, rose water, and vanilla extract. Remove from heat.
Step 4: Incorporate Gelatin: Add bloomed gelatin into the warm mixture, whisk until dissolved, then strain for a smooth texture.
Step 5: Make the Raspberry Center: Simmer raspberries, sugar, and lemon juice for 5 minutes, then blend and strain.
Step 6: Assemble the Domes: Pour panna cotta mixture halfway into silicone molds, spoon raspberry center inside, and top with remaining panna cotta.
Step 7: Chill: Refrigerate for at least 4 hours or overnight until set.
Step 8: Serve: Unmold carefully and garnish with crushed pistachios and rose petals before serving.
