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You will need a large glass
bowl (1.1 litres/2 pints) or 6–8 dessert glasses.
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Soak the gelatine in a
small heatproof bowl of cold water for 5 minutes until
soft. Squeeze out the liquid from the gelatine and tip
away all but 1 tablespoon of water. Put the gelatine back
into the bowl with the reserved tablespoon of water. Set
the bowl on top of a saucepan of gently simmering water
and stir for a few minutes until the gelatine is dissolved
and runny. Remove from the heat and set aside to keep
warm.
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Whizz the raspberries in a
food processor until blended to a smooth pulp. Place in a
sieve above a bowl and push the pulp through with a metal
spoon to remove the seeds.
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Place the egg yolks and caster
sugar in a large bowl. Use an electric hand whisk to whisk
the eggs and sugar for 4–5 minutes or until thick, pale
and fluffy and when you lift up the whisk, a trail is left
in the mixture. Stir in the raspberry purée, followed by
the runny gelatine (pass this through a sieve).
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Whip the cream to soft peaks,
then carefully fold into the raspberry mixture (see tip).
In a clean, dry bowl, whisk the egg whites until stiff.
Stir 2 tablespoons of the egg whites into the raspberry
mixture, then gently fold in the remaining egg whites.
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Spoon into the large glass
bowl or divide between the individual glasses, then chill
in the fridge for a minimum of 4 hours until set. Serve
straight from the fridge, decorated with the remaining
raspberries and sprigs of mint.
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Prepare Ahead:
The mousse can be made up to 8 hours ahead and kept in the
fridge.
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Mary’s Classic Tip:
* It is important to keep folding the whipped cream into
the raspberry mixture until smooth and evenly coloured
throughout and no lumps remain, otherwise the resulting
mousse will be flecked with spots of white cream.