Sift the flour and salt into a bowl. Blend the fats to mix and then rub into the dry ingredients. Stir in the sugar. Lightly mix the egg and vanilla essence and stir into the ingredients. Add sufficient milk to make a medium-soft consistency.
Place the heaped tablespoon of jam in the base of a well-greased
Meanwhile prepare the jam sauce. Sieve the jam into a saucepan, add the cornflour blended with the water and lemon juice and stir over the heat until the sauce is boiling and thickened. Unmould the pudding and serve hot with the sauce.