Bloom the gelatin by sprinkling it over the cold water. Let stand 5 minutes.
Blend raspberries with granulated sugar and lemon juice until smooth.
Warm the puree in a saucepan over low heat until steaming, not boiling.
Stir in the bloomed gelatin until fully dissolved. Strain to remove seeds. Cool to room temperature.
Whip the cold cream with powdered sugar and vanilla to soft peaks.
Fold one-third of the whipped cream into the cooled puree. Gently fold in the rest until no streaks remain.
Spoon into serving glasses. Chill 2–3 hours until set. Garnish with raspberries before serving.
Notes
Variation: Swirl in 2 tbsp melted white chocolate for a richer mousse, or layer with crushed shortbread. Storage: Cover and refrigerate up to 2 days; garnish just before serving.This recipe is an original creation inspired by classic Raspberry Mousse Delight flavors. All ingredient ratios and instructions are independently developed.