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Line a 450g/1lb loaf
tin with baking parchment. Put each egg white in a
separate bowl.
-
Place the egg yolks, corn flour and
sugar in a large heatproof bowl and whisk
until well combined. Place the milk in a pan and
heat gently, stirring, until
almost boiling.
-
Pour the milk on to the egg yolk mixture, whisking. Set the bowl
over a pan of gently simmering water and cook,
stirring, until the mixture thickens enough to thinly coat the back of a wooden spoon.
-
Sprinkle the gelatin over the water in a small
heatproof bowl and leave to go spongy. Place over a
pan of hot water and stir until dissolved. Stir into
the hot egg yolk mixture. Leave to cool.
-
Whip the
cream until just holding its shape. Fold it into the
egg custard, then divide the mixture into 3. Melt
the 3 types of chocolate separately by placing each in a
heatproof bowl over a pan of simmering water.
-
Fold
the dark chocolate into one egg custard portion.
Whisk one egg white until standing in soft peaks and
fold into the dark chocolate custard. Pour into the
prepared loaf tin and level the top.
-
Chill in the
coldest part of the refrigerator until just set.
Leave the remaining mixtures at room temperature. Fold
the white chocolate into another portion of the egg
custard.
-
Whisk another egg white and fold in. Pour on top of the dark chocolate layer and chill
quickly.
-
Repeat with the remaining milk chocolate and egg
white. Chill for at least 2
hours until set. To serve, carefully turn out on to
a serving dish.