MethodMix together the milk, yeast and sugar and dissolve. Sift the flour and salt and add the milk mixture and the egg. Knead together. Add the butter and knead until soft. Place in a large bowl and cover, allow to prove (double in size) in a warm place. Knock back and allow to prove again. Heat enough oil in a saucepan or small wok to fry. Roll the dough into 40-50g balls and fry in hot oil, turning occasionally. Once golden brown drain onto absorbent paper. While hot, use a squeeze bottle and squeeze jam into the doughnuts. Roll into the cinnamon sugar while hot and enjoy warm.