Stir until both the sugar and gelatine have dissolved ... Place the vac pac bag filled with the strawberry mixture into the boiling water and allow it to cook for 10 minutes.

add the glucose and 60ml/4 tablespoons of water, and bring to the boil over a medium–high heat. Mix together the remaining sugar and the pectin and slowly incorporate into the strawberry mix.

Start by putting the strawberry purée in a medium pan and heating it to 104˚F. Pour 25 grams of sugar and the apple pectin into the purée, and bring it to a boil while continuously stirring.

Boil the water and sugar together until thick then cool ... Slice the sponges in half horizontally and spread evenly with the strawberry jam. Sandwich the sponges back together, then cut into ...