Step 1

Grease and line the base and sides of a 20cm x 30cm slice pan, extending paper 2cm above the sides of the pan.

Step 2

Process biscuits in a food processor to fine crumbs. Add butter and cinnamon and process again. Press biscuit mixture into the base of prepared pan. Chill for 30 minutes or until firm.

Step 3

Combine condensed milk with lemon juice in medium bowl.

Step 4

Combine boiling water and gelatine in a small jug. Stir until completely dissolved, then stir into condensed milk mixture. Pour over biscuit base and return to the refrigerator for 1 hour or until set.

Step 5

Meanwhile, prepare jelly according to packet instructions, using 100ml less cold water than directed. Allow to come to room temperature. Pour jelly mixture over set milk filling. Chill for a further 1 hour or until jelly is set.

Step 6

Carefully remove slice from pan, then slice to serve.