Line a 9 in loaf pan with parchment and leave a little overhang.
Blitz cookies and salt in a food processor until fine. Add butter and blend until the mix holds when pressed.
Press the crust into the pan in an even compact layer. Refrigerate.
Blend cashews, vegan cream cheese, yogurt, vanilla, agave, and about 150 g lemon curd until silky and smooth.
Pour the filling over the crust. Smooth the top. Chill until set for at least 6 hours or overnight.
Warm the remaining lemon curd in a small pot until spreadable. Spoon over the set cheesecake and smooth.
Chill for 1 hour or freeze for 30 minutes. Lift out using the parchment. Cut into bars with a hot sharp knife. Wipe the blade between cuts.
Store bars in a sealed box in the fridge for up to 5 days or freeze for longer.