When the dough has risen, divide it into 16 equal sized pieces. Flatten each piece into a disk about 8 cm in diameter, and place a teaspoon of cream cheese and a teaspoon of raisins in the centre. Form the disk into a ball, with the sultanas and cream cheese in the centre. Roll each ball in caster sugar, to coat. Place stuffed balls of dough into a cast iron skillet or round baking dish and cover with cling film. Set in a warm, dry place and let it rise for one hour.