In a small saucepan, heat the lemon juice and stir in the gelatin, stirring until dissolved, set aside.
In a bowl, whip the cream cheese until fluffy
Add 1 packet of Splenda, the lemon juice / gelatin mixture, lemon zest and 1 tsp vanilla. Whip until smooth.
In a separate bowl, whip the whipped cream until stiff peaks form.
Fold in cream cheese mixture.
Fold in compote and handful of leftover whole berries (save a few for decoration).
Pour into cooled pie crust and chill several hours.