Put cashews, almonds, dates and carob powder in processor to combine into breadcrumb-like texture. Add just enough water so that mixture combines. Press mixture into pie plate lined with saran wrap (cling film). Put in freezer to set for about 5 minutes
Rinse processor.
Add to processor banana, coconut, lemon juice and flax oil and blend till creamy and smooth.
To serve: Lift up crust, peel of saran wrap and put back on plate. Spread lemon creme on base. Serve.