Patterned Roll Cake

INGREDIENTS
pattern

1 egg white
plain flour (40g)
castor sugar (30g)
knob of butter, melted (20g)
squeeze of pink food gel

sponge

3 eggs
drop of vanilla extract
pinch of cream tartare
caster sugar (90g)
plain flour (90g)
melted butter (45g)

filling

generous glug of double cream (200ml)
1 tbsp of icing sugar
drop of strawberry flavouring
3 dollops fo strawberry jam