01 -
Combine gelatin and very cold water. Let it sit for 10 minutes to absorb the liquid. If using sheets, soften them in cold water instead.
02 -
Blend strawberries until smooth and sieve to discard seeds. Heat a small portion (⅓ of it) to a warm range, about 122–140°F. Stir in hydrated gelatin until dissolved, then mix back into the cool puree. Add lemon juice to finish.
03 -
Get the cold heavy cream whipped until it turns stiff and fluffy. Place it in the fridge until you're ready to use it.
04 -
Cook the sugar with water until it reaches a temperature of 244–246°F. While that’s heating, whip egg whites until foamy. Gradually pour the hot syrup in while whipping at full speed, then keep mixing until it cools completely.
05 -
Gently fold meringue into the whipped cream, mixing partially. Add the strawberry mixture into this and fold everything together until it's smooth. Pipe the mousse into cups or glasses and let it chill for hours until set.
06 -
Simmer pureed strawberries, sugar, and lemon juice until it starts boiling. Cool this down and pour over the chilled mousse at the time of serving.