350g/12oz jam, flavour of your choice
40驳/1陆辞锄 caster sugar
50g/1戮oz vanilla sugar or caster sugar
1 tsp salt
250g/9oz strong white flour, sifted
vegetable oil, for deep-frying
1 x 7g sachet fast-action yeast
50g/1戮oz unsalted butter, melted and cooled slightly
1 free-range egg, lightly beaten
150ml/5fl oz milk, warmed to about 38C