For the base: Grease and line a 28cm x 18cm baking tray
Combine all base ingredients and mix well. Press into prepared tray. Bake in 180oC oven for 10 minutes or until golden brown.
For the filling: In a medium bowl, blend condensed milk, lemon juice and gelatine (dissolved in the boiling water).
Spread over base and refrigerate until set.
Make up jelly as directed on packet, place in fridge for 30mins until cool, then pour over slice. Return to fridge and chill until set. Cut into squares to serve.