Jam roly-poly (jam roly-poly)

Instructions

1. Mix the flour, baking powder and salt, then rub in the suet until the mixture looks like breadcrumbs.
2. Gradually add the cold water to form a soft dough.
3. Roll the dough out into a rectangle about 25 x 30 cm on a floured work surface.
4. Spread the jam over it, leaving a 2 cm border all around, then sprinkle with sugar.
5. Roll the dough up lengthways, sealing the edges with beaten egg.
6. Wrap the roll in buttered baking paper then foil, sealing the ends.
7. Steam for 2 hours, then unwrap, slice and serve hot with custard.