For the pastry:

50g cocoa powder

250g plain flour

150g unsalted butter/non-dairy margarine

1 egg

50g golden caster sugar

1-2 tbsp cold water

Pinch sea salt flakes

For the filling:

50g butter/non-dairy margarine

450ml double cream/non-dairy cream

50g golden caster sugar

300g dark chocolate (70%) — break up into small pieces

120g halva

Garnish:

3 tbsp halva, crumbled

2 tbsp pistachio nuts

1 tbsp dried rose petals – optional